[Fix] Error code 0x800f0950: installing Language packs on Windows?

Error code 0x800F0950 means Windows could not download an optional part, such as a language pack, Basic typing or .NET Framework 3.5, from Windows Update. A Windows Update policy, waiting updates or a damaged update cache is usually behind it. Install waiting updates and restart first, then check for a policy that blocks optional features.

Facts checked on 15 October 2026. Steps written for Windows 11 (25H2 and 26H2) and Windows 10 22H2.

What error code 0x800F0950 means

Windows does not keep every optional part on the disk. Language packs, Basic typing, Speech, Handwriting and .NET Framework 3.5 are Features on Demand: Windows downloads them from Windows Update when you ask for them. Error code 0x800F0950 means that download or its install failed.

So the code is not about the language itself. The same number shows up in three places, and the fixes are the same for all of them. People search it in many spellings: 0x800f0950, error code: 0x800f0950, error code = 0x800f0950 (the DISM and PowerShell form) and 800f0950.

Why error 0x800F0950 happens

The causes are ordered by how likely they are on a typical PC. Windows OS Hub, which tested language pack errors on Windows 10 and 11, fixes 0x800F0950 the same way as the WSUS error 0x80073D01. Microsoft Q&A threads with this code point to Windows Update policies as well.

How to fix error code 0x800F0950 on Windows

Fix 1 helps most home PCs and takes minutes. Fix 2 and Fix 3 remove a policy that blocks optional features. Fix 4 resets the update cache. Fix 5 is only for .NET Framework 3.5 and Fix 6 only for preview builds. Fix 7 and Fix 8 repair Windows itself.

Fix 1. Install waiting Windows updates, restart and add the language again

10 to 40 minutesNo riskEvery home PC first, and always after a Windows upgrade.

Language packs and other Features on Demand must match the exact Windows build. While an update waits for a restart, Windows is between two builds and the matching package cannot be installed. Users on Microsoft Q&A report that .NET Framework 3.5 installed after they updated Windows.

1. Open Settings > Windows Update and select Check for updates. On Windows 10 the page is Settings > Update & Security > Windows Update.
2. Install everything that is offered, including optional quality updates.
3. Restart with Start > Power > Restart. Restart once more if Windows Update still says Restart required.
4. Open Settings > Time & language > Language & region. If the failed language is listed, select ... next to it and Remove.
5. Select Add a language, pick the language, tick only Language pack and select Install.
6. When the language pack is in, add Basic typing, Speech and Handwriting one at a time in Language options.

Fix 2. Let a work or school PC get optional features from Windows Update

10 minutesRead the warningA PC managed by an organization that gets its updates from a WSUS server.

Windows OS Hub explains that a PC set to take updates from an internal WSUS server cannot get language packs from it, and that 0x800F0950 is fixed the same way. A Group Policy setting tells Windows to fetch optional features directly from Windows Update.

1. Open the Run box. Press Windows key + R.
2. Start the editor. Type the command below and select OK. Select Yes if Windows asks for permission.

   gpedit.msc

These steps were written for Windows 11 and Windows 10, Pro, Enterprise and Education (the steps are the same). The full page with the other versions and what each result means: Open the Local Group Policy Editor

1. Go to Computer Configuration > Administrative Templates > System.
2. Double-click Specify settings for optional component installation and component repair.
3. Select Enabled and tick Download repair content and optional features directly from Windows Update instead of Windows Server Update Services (WSUS). Select OK.
4. Open Terminal (Admin), apply the policy and restart the update service:

   gpupdate /force
   net stop wuauserv
   net start wuauserv

5. Add the language or turn on .NET Framework 3.5 again.

Fix 3. Remove a leftover Windows Update policy on your own PC

10 minutesRead the warningA home PC without WSUS that once ran a tweak tool or debloat script, or was a work PC before.

Two registry values can keep Windows away from Windows Update for optional features. Windows OS Hub names DoNotConnectToWindowsUpdateInternetLocations set to 1 as a block for Features on Demand, and UseWUServer as the switch that sends updates to WSUS.

1. Open Terminal (Admin) and check whether the policy key exists:

   reg query HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate /s

2. If Windows says it cannot find the key, no such policy is set. Skip to Fix 4.
3. If the key exists, press Win + R, type regedit and press Enter. Select Yes.
4. Go to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate. Export it with File > Export.
5. Double-click DoNotConnectToWindowsUpdateInternetLocations if it is there, set it to 0 and select OK.
6. Open the AU subkey. If UseWUServer is there, set it to 0.
7. Restart the update service in Terminal (Admin), then try the language again:

   net stop wuauserv
   net start wuauserv

Fix 4. Reset the Windows Update cache

10 minutesLow riskWindows Update shows errors too, or the download fails at the same point every time.

The half-downloaded package stays in the update cache and Windows reuses it at every retry. Renaming the cache folders makes Windows download the feature from zero. A Microsoft Q&A advisor suggested a full Windows Update reset for this code.

1. Open Command Prompt as administrator. Type cmd in the search box, right-click Command Prompt and select Run as administrator. Select Yes when Windows asks for permission.
2. Stop the update services. Type the commands below and press Enter after each one. If Windows says that other services depend on Cryptographic Services, it stops them too. A message that a service is not started is fine.

   net stop wuauserv
   net stop bits
   net stop cryptsvc

3. Delete the download queue files. This clears the list of downloads that the Background Intelligent Transfer Service keeps. If Windows says it cannot find the files, continue.

   del "%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat"

4. Rename the update cache folders. Renaming keeps a copy in case you need it; Windows creates new, empty folders when the services start again. If you get Access is denied, a service is still running: repeat the previous step.

   ren %systemroot%\SoftwareDistribution SoftwareDistribution.old
   ren %systemroot%\System32\catroot2 catroot2.old

5. Start the services again. Type the commands below and press Enter after each one. The requested service has already been started is fine: Windows started it on its own.

   net start cryptsvc
   net start bits
   net start wuauserv

6. Restart and check for updates. Restart the PC. Then select Start > Settings > Windows Update > Check for updates. The first check can take longer than usual because everything is downloaded again.

These steps were written for Windows 11 and Windows 10 (the steps are the same). The full page with the other versions and what each result means: Reset Windows Update components

Fix 5. Turn on .NET Framework 3.5 the way Microsoft supports for your Windows version

5 to 20 minutesNo riskAn app asked for .NET Framework 3.5 and turning it on fails with 0x800F0950.

Microsoft supports different ways by version. Windows 10 and Windows 11 up to 25H2 turn it on in Windows Features with a download from Windows Update. From Windows 11 26H1 (build 28000) it is only a standalone installer, so the Windows Features route no longer exists.

1. Check your build in Settings > System > About under OS build.
2. On Windows 10 and Windows 11 before 26H1, select Start, search for Windows Features and open it.
3. Tick .NET Framework 3.5 (includes .NET 2.0 and 3.0) and select OK. You do not need the WCF child items.
4. Select Let Windows Update download the files for you if asked, and restart when prompted.
5. On Windows 11 26H1 (build 28000) or later, use the .NET Framework 3.5 installer and its language pack from Microsoft's .NET Framework 3.5 page instead.
6. Without internet, or when Windows Update still fails, install it from Windows installation media of the same version with DISM, as Microsoft's page describes.

Fix 6. Leave the Windows Insider preview

Minutes to wait for the next release, or 1 to 2 hours for a reinstallRead the warningThe PC runs a Windows Insider build in the Dev, Canary, Beta or Release Preview channel.

Optional packages for a preview build may not be published yet or may not match it. A Microsoft community support agent advised a reader with 0x800F0950 on a preview build to leave the program. Windows OS Hub does not cover this case.

1. Open Settings > Windows Update > Windows Insider Program.
2. Open the option to stop getting preview builds.
3. In the Beta or Release Preview channel, choose to unenroll this device when the next version of Windows is released.
4. Keep installing updates. When the public release reaches your build, the PC returns to the normal channel.
5. Add the language again after that update.

Fix 7. Repair the component store with DISM and SFC

15 to 40 minutesNo riskFix 1 to Fix 4 did not help, and other updates or features fail too.

Language packs and .NET Framework 3.5 install into the same component store as updates. When that store is damaged, every new package fails. DISM repairs it and SFC then repairs the 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

Fix 8. Reinstall Windows over itself and keep your apps and files

1 to 2 hoursLow riskNothing above helped and languages, .NET 3.5 and updates keep failing.

A repair reinstall puts a clean copy of the same Windows version over the old one, with a new component store and update stack. Apps, files and settings stay.

1. Open Recovery in Settings. Open Settings > System > Recovery. Next to Fix problems using Windows Update, select Reinstall now. This keeps your apps, files and settings.

   

2. Start the reinstall. Choose whether the PC may restart on its own 15 minutes after the installation, then select OK.
3. Wait and restart. Windows Update downloads and installs a repair copy of your current Windows version. Keep the PC plugged in and online, and restart it when asked.

These steps were written for Windows 11 22H2 and later. The full page with the other versions and what each result means: Reinstall Windows without losing files

If error 0x800F0950 does not go away

Before you reset Windows, read what the servicing stack wrote. It names the package that failed, and it is what support or an administrator will ask for.

1. Press Win + R, type %windir%\Logs\CBS and press Enter.
2. Copy CBS.log to the Desktop and open the copy in Notepad.
3. Press Ctrl + F and search for 0x800f0950. The lines just above the last hit name the package, such as a LanguageFeatures or NetFx3 package.
4. For DISM and Add-WindowsCapability, open %windir%\Logs\DISM\dism.log and search the same way.

How to keep error 0x800F0950 from coming back

Frequently asked questions

What does error code 0x800F0950 mean?

It means Windows could not download or install an optional feature from Windows Update. The feature is usually a language pack, a language feature such as Basic typing, or .NET Framework 3.5. The code is the same in Settings, in Windows Features and in DISM or PowerShell. The usual causes are updates waiting for a restart, a Windows Update policy or WSUS server that blocks optional features, and a damaged update cache.

How do I fix error code 0x800F0950 on Windows 11?

Start with Fix 1: install every waiting update in Settings > Windows Update, restart, then add the language again with only the language pack ticked. On a work or school PC, enable the Group Policy setting for optional component installation in Fix 2. On a home PC that once ran tweak tools, check the Windows Update policy key in Fix 3. Then reset the update cache and repair the component store.

Is error 0x800F0950 on Windows 10 fixed the same way?

Yes. The code means the same on Windows 10 22H2, and all eight fixes work there. Only the paths differ: Windows Update is under Settings > Update & Security, and languages are under Settings > Time & Language > Language. Windows 10 left support on 14 October 2025, so keep in mind that a PC without extended security updates gets no new fixes from Microsoft.

What does Add-WindowsCapability failed. Error code = 0x800f0950 mean?

It is the same error, shown by PowerShell or DISM when an administrator adds a capability such as a language feature or RSAT. The command could not get the package from Windows Update. On managed PCs the WSUS policy is the usual reason, so Fix 2 applies first. On your own PC, check the policy values in Fix 3, then reset the update cache. Look in dism.log for the package name.

Why does .NET Framework 3.5 fail with 0x800F0950?

.NET Framework 3.5 is downloaded from Windows Update when you turn it on, so the same blocks apply: waiting updates, a WSUS policy or a damaged cache. Microsoft also says that from Windows 11 26H1 (build 28000) it is no longer a Windows component, only a standalone installer. On earlier versions, use Windows Features or installation media of the same Windows version, as Fix 5 explains.

Why can't I install the Basic typing feature with error 0x800F0950?

Basic typing is a separate Feature on Demand from the language pack, so it can fail on its own. Remove nothing yet. Install waiting updates and restart, then open Settings > Time & language > Language & region, select the three dots next to the language, then Language options, and add Basic typing again. If the code returns, the policy and cache fixes apply to it the same way.

Is 0x800F0950 the same as 0x800F0954?

No, but they are close. Windows OS Hub lists 0x800F0954 and 0x800F0908 for language pack downloads that fail on a metered connection or a damaged update cache. 0x800F0950 is fixed like the WSUS error 0x80073D01, with the Group Policy setting in Fix 2. Resetting the update cache in Fix 4 helps with all of them.

Why do all my DISM commands fail with error 87?

Error 87 means DISM did not accept a parameter, which is usually a typing error. Type the command with no spaces after the slashes, for example DISM /Online /Cleanup-Image /RestoreHealth, in Terminal opened as administrator. A Microsoft community agent told one reader with this result on a preview build to leave the Insider program first. Once DISM runs, go back to Fix 7.

Can I install a language pack offline to avoid 0x800F0950?

On a running PC, the supported ways are Add a language in Settings and Install-Language in PowerShell, and both download from Windows Update. Administrators can add languages from Microsoft's Features on Demand media for the exact Windows build. Do not install language .cab files from download sites. They cannot be checked and may not match your build, which can cause new errors.

Will a Windows upgrade fail because of error 0x800F0950?

It can stop an upgrade that needs to bring your installed languages along, as in the reader's question at the top. Finish all waiting updates and restart first, then install the languages again before the upgrade. If a language still fails, remove it from Preferred languages, run the upgrade and add the language back afterwards. Keep at least one working display language.