How to fix RAVCpl64.exe System Error in Windows?

RAVCpl64.exe is the Realtek HD Audio Manager, and its System Error at sign-in almost always says that ResampleDmo.DLL was not found. That DLL is a Windows media file, not a Realtek one, so the fix is usually on the Windows side. Check whether your Windows is an N edition first.

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

What the RAVCpl64.exe System Error means

The window title is RAVCpl64.exe - System Error. The text reads "The code execution cannot proceed because ResampleDmo.DLL was not found. Reinstalling the program may fix this problem." Windows shows it before the Realtek program runs at all: the loader looked for a DLL the program needs, did not find it, and stopped the start.

The important detail is the name of the missing file. ResampleDmo.DLL is a Microsoft file in C:\Windows\System32, part of the Windows media components that convert audio between sample rates. Realtek did not write it and its installer does not put it there. That is why reinstalling the Realtek program alone often does not help.

People search for this window in many spellings. They all mean the same thing:

• ravcpl64, ravcpl, ravcpi64 and AVCpl64.exe are typing variants of RAVCpl64.exe. The name stands for Realtek Audio Volume Control Panel, 64-bit.
• RAVCpl64.exe Systemfehler is the German title of the same window.
• ravcpl64 startup and RTHDVCPL refer to the startup entry that launches it at sign-in, with the -s switch that keeps it hidden.
• RAVCpl64.exe - Application Error is a different window: the program started and then crashed. Fix 2 and Fix 4 apply to it.
• GDI+ Window (RAVCpl64.exe) is not an error. Users report that Windows lists it among the apps that keep the PC from shutting down. It is the panel's hidden window; Fix 3 removes it.

What is RAVCpl64.exe, and do you need it?

RAVCpl64.exe is the Realtek HD Audio Manager, also shown as HD Audio Control Panel. It is the settings window of the Realtek High Definition Audio driver: speaker setup, jack detection, equalizer and microphone effects. It starts hidden with Windows so that it can react when you plug in headphones.

Usual location

C:\Program Files\Realtek\Audio\HDA\RAVCpl64.exe

Startup entry

RTHDVCPL, which runs the file with the -s switch; Task Manager shows it as Realtek HD Audio Manager.

Publisher

Realtek Semiconductor. The genuine file carries a digital signature.

Needed for Windows?

No. It is not a Windows system file. The audio driver plays sound without it.

Related files

RAVBg64.exe is another Realtek process from the same HDA folder; RTKVHD64.sys is the Realtek audio driver itself.

Newer PCs often have no RAVCpl64.exe at all, because their audio settings come in a different Realtek app installed with the PC maker's driver. If you see RAVCpl64.exe, your PC uses the older Realtek HD Audio Manager package, which Realtek lists for Windows Vista to Windows 10 only.

What causes the RAVCpl64.exe System Error, most common first

Realtek has not published a cause for this window. The order below follows from what the message names, what Microsoft says N editions leave out, and what users report.

How to fix the RAVCpl64.exe System Error

Fix 1 is for N editions and solves most cases. Fix 2 and Fix 4 repair the Realtek driver, and Fix 3 silences the panel when you do not need it. Fixes 5 to 7 are for the rare cases that remain.

Fix 1. Install the Media Feature Pack on a Windows N edition

15 minutesLow riskYour edition name ends in N (Windows 11 Pro N, Windows 10 Home N and so on).

Microsoft says N editions leave out media technologies and Windows Media Player. The Media Feature Pack puts them back, and with them the media file the Realtek panel needs. Microsoft also notes that some features need the hardware driver reinstalled after the pack.

1. Press Win + I, open System > About and read Edition under Windows specifications. If it does not end in N, go to Fix 2.
2. Windows 11 N: open Settings > Apps > Optional features and select View features next to Add an optional feature.
3. Windows 10 N: open Settings > Apps > Apps & features > Optional features > Add a feature.
4. Find Media Feature Pack in the list, tick it, select Next and then Add (Windows 10: Install).
5. Wait until the pack shows as installed under Recent actions, then restart the PC.
6. Reinstall the audio driver as in Fix 2, as Microsoft advises for features that use hardware drivers.

The same in an elevated Terminal or Command Prompt, if the Settings list does not show the pack:

DISM /Online /Add-Capability /CapabilityName:Media.MediaFeaturePack~~~~0.0.1.0

Fix 2. Install the audio driver from your PC or motherboard maker

20 minutesLow riskA normal edition, an old Realtek HD Audio Manager, or the error began after a Windows upgrade or a driver from Realtek's own site.

Realtek says the drivers on its own site are general drivers that may lack the changes your PC or motherboard maker made, and tells users to get the latest driver from that maker. The maker's package fits your audio chip and your Windows version.

1. Find your model: press Win + R, type msinfo32 and press Enter. Read System Manufacturer and System Model (or BaseBoard Product on a self-built PC).
2. Open the support page of that maker, enter the model or serial number and select your Windows version.
3. Download the Audio or Realtek Audio driver listed for your model.
4. Run the downloaded package and follow its steps. Most packages remove the old Realtek driver first and ask for a restart.
5. Restart the PC when the installer asks.

Fix 3. Stop the Realtek HD Audio Manager from starting at sign-in

2 minutesLow riskSound works, you never open the Realtek panel, and you only want the window gone.

The error appears because the startup entry RTHDVCPL launches RAVCpl64.exe at every sign-in. With the entry off, Windows never tries to load the program, so the window does not appear. The audio driver still plays sound.

1. Open the Startup settings. Select Start > Settings > Apps > Startup.

   

2. Turn apps off. Set the switch of each app you do not need at sign-in to Off. Use Sort by to put the apps with the highest impact first.
3. Or use Task Manager. Right-click Start, select Task Manager, then Startup apps. Select an app and select Disable. Task Manager shows the same list with more detail, such as the publisher.

   

4. Restart to check. Restart the PC. The apps you turned off no longer open by themselves.

These steps were written for Windows 11 24H2, 25H2 and 26H2. The full page with the other versions and what each result means: Stop apps from opening at startup

In the list, turn off Realtek HD Audio Manager (it can also be listed as HD Audio Control Panel or RAVCpl64.exe). Step by step: Stop apps from opening at startup

Fix 4. Remove and reinstall the Realtek audio device in Device Manager

10 minutesLow riskFix 2 did not replace the old panel, or RAVCpl64.exe crashes with an Application Error.

Removing the device together with its driver package clears the old Realtek HD Audio Manager install. On the restart Windows installs a driver again, and the maker's package from Fix 2 then installs onto a clean device.

1. Right-click Start and select Device Manager.
2. Expand Sound, video and game controllers and right-click Realtek High Definition Audio (or Realtek(R) Audio).
3. Select Uninstall device, tick Attempt to remove the driver for this device and select Uninstall.
4. Restart the PC. Windows detects the audio chip and installs a basic driver.
5. Run the maker's audio package from Fix 2.

More on the Driver tab, rolling back and optional driver updates: Update, roll back or reinstall a driver

Fix 5. Check that RAVCpl64.exe is the real Realtek file and scan it

10 minutesNo riskRAVCpl64.exe runs from an unusual folder, or you are not sure it belongs to Realtek.

Malware can borrow the name of a known process, especially from C:\Windows or C:\Windows\System32. The real Realtek panel has a fixed folder and Realtek's signature.

1. Press Ctrl + Shift + Esc to open Task Manager and open the Details tab.
2. Right-click RAVCpl64.exe and select Open file location. The folder should be C:\Program Files\Realtek\Audio\HDA.
3. Right-click the file, select Properties and open Digital Signatures. The signer should be Realtek Semiconductor.
4. If the folder or the signer is different, run a full scan with Microsoft Defender.

Microsoft Defender's full scan and Protection history: How to scan for malware with Microsoft Defender

Fix 6. Repair Windows system files with DISM and SFC

20 minutesNo riskA normal (not N) edition where ResampleDmo.dll is missing, or other programs also report missing DLLs.

On a normal edition ResampleDmo.dll is a Windows file, so a damaged Windows image can lose it. DISM repairs the image and SFC puts protected Windows files back from it.

1. Open Terminal or Command Prompt as administrator.
2. Run DISM /Online /Cleanup-Image /RestoreHealth, then sfc /scannow, as the procedure below shows.
3. Restart the PC.

Step by step: Run DISM and SFC to repair Windows system files

Fix 7. Return Windows to a restore point from before the error

20 minutesLow riskThe error began on a known day and you have a restore point from before it.

A restore point brings back drivers, startup entries and Windows files as they were on that day. Your documents and pictures are not touched.

1. Press Win + R, type rstrui and press Enter.
2. Select Choose a different restore point and pick one dated before the first RAVCpl64.exe window.
3. Select Scan for affected programs, then Next and Finish.

Full steps: Undo recent changes with System Restore

If the RAVCpl64.exe error is still there: where to look and what to send

The System Error window is all Windows tells you on screen. These places hold the rest:

When you ask the PC maker's support for help, send the exact window text, your Windows edition and version, the PC or motherboard model, the audio driver version from Device Manager and what you already tried.

How to keep the RAVCpl64.exe error from coming back

Frequently asked questions

What is RAVCpl64.exe?

RAVCpl64.exe is the Realtek HD Audio Manager, the settings panel of the Realtek High Definition Audio driver. It lives in C:\Program Files\Realtek\Audio\HDA and starts hidden at sign-in through the RTHDVCPL startup entry. It handles speaker setup, jack detection and sound effects. It is not a Windows system file, and the driver plays sound without it.

Is RAVCpl64.exe a virus?

No, not when it sits in C:\Program Files\Realtek\Audio\HDA and carries Realtek's digital signature. Check both in the file's Properties, as Fix 5 shows. A file with the same name in C:\Windows, C:\Windows\System32, your user folder or Temp is not the Realtek panel. Scan it with Microsoft Defender and do not allow it in any security setting.

How do I fix the RAVCpl64.exe system error on Windows 11?

Check your edition in Settings > System > About first. If it ends in N, install the Media Feature Pack from Settings > Apps > Optional features and reinstall the audio driver (Fix 1). If not, install the audio driver from your PC or motherboard maker (Fix 2). The message is the same on Windows 10, and so are the fixes.

Can I download RAVCpl64.exe or ResampleDmo.dll and put it back?

We do not recommend it. ResampleDmo.dll is a Microsoft file that belongs to the Windows media components, and a copy from a download site is unsigned and may not match your Windows build. RAVCpl64.exe comes inside the Realtek driver package. Get the media files with the Media Feature Pack (Fix 1) and the panel with the PC maker's audio driver (Fix 2).

Does running regsvr32 ravcpl64.exe fix it?

No. regsvr32 registers DLL and OCX components; it does not register an EXE file and does not create a missing DLL. When the window says ResampleDmo.DLL was not found, nothing on the PC can be registered to replace it. Add the missing Windows media files with Fix 1 or repair Windows files with Fix 6.

Can I disable RAVCpl64.exe at startup?

Yes. Turn off Realtek HD Audio Manager in Settings > Apps > Startup or in Task Manager's Startup apps (Fix 3). Sound keeps working because the driver itself does not need the panel. Users report that on some PCs automatic switching to headphones stops without it. If you notice that, turn the entry back on and repair the cause instead.

What is the GDI+ Window RAVCpl64.exe at shutdown?

It is a hidden window that the Realtek panel keeps open. Users report that Windows sometimes lists GDI+ Window (RAVCpl64.exe) among the apps that keep the PC from shutting down. It is not an error and not malware. Select Shut down anyway, or turn off the panel at startup (Fix 3) if it happens often.

What is RAVBg64.exe?

RAVBg64.exe is another Realtek process from the same C:\Program Files\Realtek\Audio\HDA folder, installed with the Realtek HD Audio Manager package. We could not confirm its exact role from Realtek. If it shows the same ResampleDmo.DLL window, the same fixes apply, because it belongs to the same driver package and needs the same Windows media files.

Why does the error appear only after I sign in?

Because that is when the RTHDVCPL startup entry runs RAVCpl64.exe with the -s switch. Windows loads the program's DLLs at that moment, finds that ResampleDmo.DLL is missing and shows the window. Nothing else on the PC calls the Realtek panel, so the window rarely appears at other times, for example when you open the Realtek panel by hand.

I searched in another language. Is this the right page?

Yes, if the window you see names RAVCpl64.exe. The German title RAVCpl64.exe Systemfehler and other translations are the same System Error. This guide is written in English; the menu names in Windows are translated on your PC, but the file names RAVCpl64.exe and ResampleDmo.DLL stay the same in every language.