How to fix black squares behind folder icons in Windows?

Black squares on desktop icons or behind folders are not a virus and not a broken screen. Windows is showing a stored picture of the icon that went wrong: a damaged icon or thumbnail cache, or a registry tweak that hid the shortcut arrows. Look where the square sits, then rebuild the matching cache.

Facts checked on 14 October 2026. Steps written for Windows 11 (25H2 and 26H2) and Windows 10 22H2.

What the black squares on desktop and folder icons are

Windows does not draw every icon from scratch each time you open the desktop or a folder. File Explorer reads the icon or preview once, stores a ready copy in a cache file in your user profile, and shows that copy afterwards. A black square is a stored copy that went wrong: the transparent parts of the picture were saved or drawn as solid black.

The square looks different depending on which stored picture is broken, and that look is the best clue you have. There is no error code to search for, so check where the black sits before you try anything:

Nothing in this list is a sign of malware, and no file has been lost. The icons look wrong, but the programs, shortcuts and folders behind them work as before. You can double-click a black icon and it opens what it always opened.

Why desktop icons have black squares: causes ranked

The forum threads and Microsoft Q&A questions on this symptom go back more than fifteen years, and the causes have stayed the same. In the order we see them most often in those reports:

Two of these causes repair themselves for a while and then come back, which confuses many readers. When the black squares return after every restart, the cache is not the real problem. Something keeps writing a bad picture into it: the arrow tweak or an add-on. Rebuild the cache only after you remove that source.

Where Windows keeps icon and thumbnail pictures

Every fix below clears or changes one of four places. They all belong to your own user account, except the registry value for the shortcut overlay, which applies to every account on the PC. Knowing them helps you check that a fix really ran:

How to fix black squares on desktop icons and folders

Fix 1 repairs most cases in two minutes and is safe to try first. Fix 2 is for black squares in the corner of shortcuts. Fixes 3 and 4 are for folders in File Explorer. Fixes 5 to 7 are for squares that keep coming back.

Fix 1. Refresh and rebuild the icon cache

2 minutesLow riskAnyone with black icons on the desktop, taskbar or in folders; also the second half of Fix 2.

The icon cache holds the ready pictures that Explorer shows. Deleting the cache files while Explorer is closed forces Windows to draw every icon again from the program files, so a stored black copy cannot be reused.

Start with the light refresh. ie4uinit.exe is a Windows program that tells Explorer to reload its icons without closing anything. If the squares stay, delete the cache files with the commands that follow. Save your work first: the taskbar and desktop disappear for a few seconds while Explorer is closed.

1. Press Win + R, type cmd and press Enter. Use Command Prompt, not PowerShell: the del options below are written for Command Prompt.
2. Type the light refresh and press Enter. Look at the desktop for a few seconds.

   ie4uinit.exe -show

3. If the squares are still there, close Explorer. The taskbar and desktop icons disappear; the Command Prompt window stays open.

   taskkill /IM explorer.exe /F

4. Delete the old single cache file. If it does not exist, the command says it could not find it, which is fine.

   DEL /A /F /Q "%localappdata%\IconCache.db"

5. Delete the current cache files.

   DEL /A /F /Q "%localappdata%\Microsoft\Windows\Explorer\iconcache*"

6. Start Explorer again. The taskbar and desktop come back and the icons are drawn fresh.

   start explorer.exe

7. If some icons still look wrong, restart the PC once. Windows writes a new cache while it signs you in.

A message that a file is in use means Explorer was still running when you ran DEL. Run the taskkill line again, wait two seconds and repeat the two DEL lines.

Fix 2. Repair or undo the shortcut arrow tweak in the registry

10 minutesRead the warningBlack squares sit in the lower-left corner of shortcuts, where the shortcut arrow used to be.

Hiding the shortcut arrow works by replacing the overlay picture through the registry value 29. When that value points to a picture Windows cannot draw as transparent, every shortcut gets a black square instead of no arrow, and the icon cache stores it again after each restart.

If a tweak app removed the arrows for you, turn that option off in the same app first and restart Explorer. That writes the same change as the steps below, and the app will not put its own value back later. Otherwise, check the registry by hand:

1. Press Win + R, type regedit and press Enter. Select Yes in the User Account Control prompt.
2. Click the address bar at the top of Registry Editor, paste this path and press Enter:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Icons

3. If Registry Editor cannot find Shell Icons, nobody changed the shortcut overlay on this PC. Close Registry Editor and use Fix 1 and Fix 5 instead.
4. In the right pane, look at the Data column of the value named 29. Note what it says before you change it.
5. To get the normal arrows back and end the squares for good, right-click 29, select Delete and confirm with Yes.
6. To keep shortcuts without arrows, double-click 29 instead and type the full path of a fully transparent .ico file that really exists, for example C:\Windows\blank.ico. Select OK.
7. Close Registry Editor and run Fix 1 from step 3 on, so the black copies leave the icon cache.

A Data value of %windir%\System32\shell32.dll,-50 is the one most often reported with black squares. Many older guides gave that line to hide the arrows. Users on Microsoft Q&A and Super User report that it works at first and the black squares follow after a restart or an Explorer restart.

The ElevenForum tutorial for Windows 11 uses a separate file instead: blank.ico, a 24 x 24 pixel transparent icon placed in C:\Windows. Its author notes that the file can live in another folder, as long as every user account can read it, or the icon may not work for them.

Fix 3. Clear the thumbnail cache for black folder backgrounds

3 minutesNo riskFolders in File Explorer show a black background, mostly in Medium, Large or Extra large icons view.

File Explorer builds a folder's icon from previews of the pictures and videos inside it and stores the result in the thumbnail cache. Clearing that cache makes Windows build each folder preview again, without the black background.

Disk Cleanup is the simplest way and works on Windows 11 and Windows 10. Microsoft's page on freeing up drive space notes that Thumbnails is one of the boxes that is ticked by default, so most of the work is already set up for you:

1. Type disk cleanup in the search box on the taskbar and select Disk Cleanup.
2. Select the C: drive and select OK.
3. Make sure Thumbnails is ticked. Untick anything else you want to keep, such as Recycle Bin.
4. Select OK, then Delete Files to confirm.
5. Restart the PC so Explorer starts with an empty thumbnail cache.

If Disk Cleanup does not remove every file, or you want it done without a restart, delete the cache files with commands. These are the same commands the ElevenForum thumbnail tutorial uses. Save your work first:

Run in Command Prompt, one line at a time

taskkill /f /im explorer.exe
DEL /F /S /Q /A %LocalAppData%\Microsoft\Windows\Explorer\thumbcache_*.db
start explorer.exe

The first time you open a large folder afterwards, the previews take a moment to appear. That is Windows building them again, and it happens once.

Fix 4. Reset the picture of one folder and test the icon setting

3 minutesNo riskOne or a few folders keep a black background after Fix 3, or you want to prove the previews are the cause.

A folder can carry its own chosen picture, and that picture is used for its preview. Restoring the default makes Windows build the folder icon again from scratch, and turning previews off for a moment shows whether thumbnails are the cause at all.

1. In File Explorer, right-click the folder with the black background and select Properties.
2. Open the Customize tab.
3. Under Folder pictures, select Restore Default, then OK.
4. Press F5 in the File Explorer window to redraw the folder.

Then run a short test that tells you whether the problem lives in the previews or in the icons themselves. You turn previews off for a moment and back on afterwards:

1. On Windows 11, open File Explorer, select See more (the three dots) and then Options. On Windows 10, select View > Options > Change folder and search options.
2. Open the View tab.
3. Under Advanced settings, tick Always show icons, never thumbnails and select Apply.
4. Look at the folders. If the black backgrounds are gone, the thumbnail side is at fault: run Fix 3 once more, then Fix 5.
5. Untick Always show icons, never thumbnails and select OK to get your previews back.

Leaving the box ticked also hides the black backgrounds for good, but you lose all picture and video previews in every folder. Use it as a test or as a stopgap, not as the repair.

Fix 5. Remove the add-on that keeps redrawing the black squares

15 minutesLow riskThe squares come back after every cache rebuild or restart, or started after you installed a customization tool.

Icon packs, theme tools, tweak apps, thumbnail extensions and codec packs plug into File Explorer and supply their own pictures. If one of them hands Explorer a picture without transparency, every rebuilt cache gets the same black squares again.

Think back to what you installed or changed shortly before the squares appeared. These are the kinds of tools that touch icons and previews:

• Tools that remove the shortcut arrow, change system icons or apply icon packs and themes. Undo their changes inside the tool before you uninstall it, or the registry change stays behind.
• Thumbnail extensions that add previews for more video, audio or archive types. The Icaros project has an open report since September 2023 of folder icons with black backgrounds on Windows 11 23H2, later also on Windows 10 22H2.
• Codec packs that bring their own thumbnail extension along with the codecs.
• Cloud storage and backup apps that draw status badges over icons. These were not named in the reports we read, so test them only if the steps above find nothing.

Uninstall the suspect tool, restart, and repeat Fix 1 and Fix 3 once. Step by step: Uninstall a program or app in Windows. If you cannot tell which program it is, a clean boot starts Windows without third-party services and startup apps. If the squares stay away after a cache rebuild in a clean boot, one of them is the source. Step by step: How to perform a clean boot in Windows.

1. Open System Configuration. Select Search on the taskbar, type msconfig and select System Configuration from the results.
2. Hide Microsoft services. On the Services tab, select the Hide all Microsoft services check box. Only services from other companies stay in the list.
3. Disable the remaining services. Select Disable all, then select Apply.
4. Open Task Manager. On the Startup tab of System Configuration, select Open Task Manager.
5. Disable the startup apps. On the Startup apps tab in Task Manager, select each item whose status is Enabled and select Disable. Write down or take a screenshot of the items you disable: you need the list to turn them back on.
6. Confirm the changes. Close Task Manager. On the Startup tab of System Configuration, select OK.
7. Restart and test. Restart the PC. Windows now starts in a clean boot environment: try again the thing that failed (run the app, install the update, uninstall the program).

These steps were written for Windows 11 25H2 and 26H2. The full page with the other versions and what each result means: How to perform a clean boot in Windows

Fix 6. Update or reinstall the graphics driver

10 minutesLow riskBlack squares come together with other drawing faults, or Fixes 1 to 5 did not hold.

Windows draws icons and their transparent edges with help from the graphics driver. A collaborator on the Icaros project pointed to this and suggested testing with Microsoft's basic display driver, so a faulty driver is worth ruling out.

Get the current driver for your graphics card through Windows Update or Device Manager. A driver installed fresh from the card maker's own site is the best test. If the problem started right after a driver update, roll that driver back instead. Step by step: Update, roll back or reinstall a driver.

1. Open Device Manager. Right-click Start and select Device Manager.
2. Open the device's Driver tab. Expand the category (for example Display adapters), right-click the device, select Properties and open the Driver tab. Driver Date and Driver Version show what is installed now.
3. Update the driver. Select Update Driver and let Windows search automatically. To use a driver you downloaded from the device maker, select Browse my computer for drivers instead and point to the unpacked folder.

These steps were written for Windows 11 24H2 and later. The full page with the other versions and what each result means: Update, roll back or reinstall a driver

After the new driver is in, restart the PC and run Fix 1 once more. The cache may still hold pictures drawn by the old driver, so a new driver alone does not always clear squares that are already there.

Fix 7. Repair Windows system files with SFC and DISM

20 minutesNo riskOther parts of Windows also misbehave, or every fix above failed.

The icons and the transparent overlay pictures come from Windows system files such as shell32.dll and imageres.dll. If one of those files is damaged, SFC replaces it with a good copy and DISM repairs the store SFC copies from.

This is the method the old version of this guide put first. It rarely helps with black squares alone: one user on ElevenForum ran SFC and DISM every week and still had black folder backgrounds. Use it when the symptom comes with other faults. Step by step: Run DISM and SFC to repair Windows system files.

1. Open an elevated command window. Right-click Start and select Terminal (Admin), or type cmd in the search box, right-click Command Prompt and select Run as administrator. Select Yes when Windows asks for permission.
2. Run DISM first. Type the command below and press Enter. DISM downloads clean copies of damaged components from Windows Update, so it can take several minutes. Wait until it says The operation completed successfully.

   DISM.exe /Online /Cleanup-Image /RestoreHealth

3. Run System File Checker. In the same window, type the command below and press Enter. Do not close the window until the verification reaches 100%.

   sfc /scannow

4. Read the result and restart. Compare the last message with the table below this guide, then restart the PC so that repaired files are loaded.

These steps were written for Windows 11 24H2 and 25H2. The full page with the other versions and what each result means: Run DISM and SFC to repair Windows system files

Restart the PC after the repair and run Fix 1 again, so the icons are drawn from the repaired files.

Black squares still there: narrow it down

Windows writes no error message, error code or Event Viewer entry for black icons that we could find, so the checks below take the place of a log. Each one rules out a whole group of causes in a few minutes:

If the squares appeared after a recent change and none of the fixes held, System Restore can take Windows back to a point before that change. It keeps your documents but removes programs and drivers installed after the point. Step by step: Undo recent changes with System Restore.

• What to send to support: your Windows version from winver, a screenshot of the squares, the Data of value 29 if it exists, and the list of tools you use to change icons or previews.
• When it is hardware: only when the squares are missing from a screenshot, or when they also show on the startup screen before Windows loads.
• What not to do: reset or reinstall Windows for this. The old version of this guide offered it, but it erases far more than the problem needs.

Keep black squares from coming back

Most returns of the black squares come from the same few habits. These steps keep the caches clean and the overlay valid:

If you use a thumbnail extension for extra video or archive types, keep it updated and clear the thumbnail cache once after each update. A cache built by an older version of the extension can keep old black previews.

Frequently asked questions

Why do my desktop icons have black squares on them?

Windows is showing a damaged stored copy of the icon. Explorer keeps ready pictures of icons in a cache, and when that copy is saved or drawn wrongly, the transparent parts turn black. The three usual sources are a damaged icon cache, a damaged thumbnail cache and a registry tweak that removed the shortcut arrows. The position of the square tells them apart: a square in the lower-left corner of shortcuts points to the arrow tweak, a fully black icon to the icon cache, and a black background behind folders to the thumbnail cache. None of these is a virus or a sign of lost files.

Why are my desktop icons black squares after a Windows update?

An update often restarts Explorer or the whole PC while Explorer is writing its cache. If that write is cut off, the icon cache can keep black pictures. Fix 1 deletes the cache and makes Windows draw every icon again. If you had hidden the shortcut arrows before the update, the update may also have made Windows rebuild the cache with the bad overlay picture from value 29. In that case Fix 2 is the lasting repair. Updates do not change your files, so nothing needs restoring.

Is the black square on desktop icons a virus?

No, not on its own. Black squares come from how Windows stores and draws icon pictures, and the forum reports on this symptom go back to Windows Vista. The programs behind the black icons still open normally. If you also see pop-ups, new programs you did not install or a changed browser home page, run a scan anyway. Step by step: How to scan for malware with Microsoft Defender. A scan will not remove the squares, though; the fixes on this page do.

How do I fix black squares on desktop icons in Windows 10?

The fixes are the same as on Windows 11. The commands of Fix 1 and Fix 3, the registry path of Fix 2 and Disk Cleanup work the same way on Windows 10 22H2. Only the way to Folder Options differs: on Windows 10 select View > Options > Change folder and search options in File Explorer. Windows 10 stopped receiving support on 14 October 2025, so a damaged system file will not be fixed by a later update there.

What is the black square in the corner of my shortcut icons?

It sits where the small curved shortcut arrow normally is. Someone, or a tweak app, replaced that arrow through the registry value 29 under Shell Icons, and Windows cannot draw the replacement as transparent. The value %windir%\System32\shell32.dll,-50 is the one most often reported with this. Delete value 29 to get the normal arrows back, or point it to a real transparent .ico file, then rebuild the icon cache. Fix 2 has the steps.

Why is there a black box around my folder icons in File Explorer?

Folder icons in File Explorer are previews built from the pictures and videos inside the folder, and they are stored in the thumbnail cache. When that cache keeps a broken preview, the folder gets a black background. Clear the thumbnail cache with Disk Cleanup or with the commands in Fix 3. For a single stubborn folder, use Properties > Customize > Restore Default in Fix 4. If the backgrounds keep returning, a thumbnail extension or codec pack is the usual suspect (Fix 5).

Is it safe to delete IconCache.db and the thumbcache files?

Yes. These files hold only pictures of icons and previews, not your files or settings. Windows creates them again the next time Explorer needs an icon. Expect the first opening of large picture folders to be a little slower while previews are built again. Delete them only while Explorer is closed, as the commands in Fix 1 and Fix 3 do; otherwise Windows reports that the files are in use and keeps them.

Why do the black squares come back after every restart?

Because something keeps writing a bad picture into the cache. Rebuilding the cache only clears the result, not the source. The two usual sources are the shortcut arrow value 29 pointing to an unusable picture, and an add-on that supplies icons or previews, such as an icon pack or thumbnail extension. Check value 29 first (Fix 2), then remove or undo customization tools one by one (Fix 5). A clean boot helps you find a hidden one.

What about a black square on the Windows screen, not on icons?

This page covers black squares on icons and behind folders. A black box that floats over the screen, a window or the taskbar is a different problem, and we did not research it for this page. Two checks from this guide still help: a screenshot shows whether Windows draws it or the monitor does, and a clean boot shows whether an app draws it. If a third-party app is not the cause, update the display driver as in Fix 6.