aavmrpch.dll is an Avast Antivirus component, not a Windows system DLL. Its reported description is Avast AAVM Remote Procedure Call Library, and the safest fix for missing, “not found,” “Bad Image,” or entry-point errors is to repair the Avast installation that owns it.
Do not download this DLL from a random file library, copy it into System32, or start with regsvr32. Those actions can introduce the wrong Avast build, the wrong architecture, or malware without repairing the damaged installation.
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What aavmrpch.dll is
The file is associated with Avast Antivirus products, including older Avast Antivirus, Free Antivirus, Internet Security, Premier, and Premium Security installations. Public metadata reports the internal name as AavmRpc.dll and identifies AVAST Software as the publisher.
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C:Program FilesAVAST SoftwareAvastaavmrpch.dll
Older Avast installations used a path similar to:
C:Program FilesAlwil SoftwareAvast4aavmrpch.dll
It should not normally be in:
C:WindowsSystem32
C:WindowsSysWOW64
The exact filename should not be treated as proof of safety. Check both the location and the digital signature.
Publicly indexed file records
These are third-party observations of files associated with older Avast installations, not an official Avast replacement list.
| Architecture | Reported version | Reported size |
|---|---|---|
| 64-bit | 19.8.4793.0 | 0.43 MB |
| 32-bit | 18.5.3931.0 | 0.49 MB |
| 32-bit | 17.9.3761.0 | 0.4 MB |
| 32-bit | 17.3.3443.0 | 0.36 MB |
| 32-bit | 10.0.2208.712 | 0.22 MB |
| 32-bit | 9.0.2021.515 | 0.2 MB |
Do not select one of these versions as a manual replacement. Avast must supply the matching file through repair or installation.
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Check whether the file is genuine
If the error mentions a path, examine that exact copy. If it does not, search for the filename carefully.
- Open File Explorer.
- Search for
aavmrpch.dllon the drive where Avast is installed. - Right-click the file and select Properties.
- Check the Location field on the General tab.
- Open Digital Signatures, if that tab is present.
- Select the signature and choose Details.
A copy in an Avast folder with a valid AVAST Software signature is consistent with the expected file. A copy in System32, a temporary directory, a browser folder, or an unrelated application directory deserves extra caution. Scan it with your security software rather than assuming it is legitimate.
If Avast or Microsoft Defender quarantined the file, use the quarantine steps below instead of copying a replacement from the internet.
What the error message means
The wording helps identify the repair branch.
“aavmrpch.dll is missing” or “was not found”
Usually, the file was deleted, quarantined, or never installed correctly. It can also indicate that an Avast update was interrupted or that another Avast component still expects an older installation layout.
Repair Avast first. If the file is not restored, perform a clean reinstall.
“Could not be loaded” or error 126
This generally means Windows could not load the DLL or one of its dependencies. The file may be absent, corrupted, blocked, or incompatible with the other Avast files.
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Do not assume that replacing only aavmrpch.dll will solve this. A mismatched group of Avast files is more likely after an incomplete update.
“Entry point not found”
An entry-point error usually indicates that one Avast component is calling a function that another component does not contain. In practice, that points to mixed versions, a failed update, or an older Avast defect rather than a simply missing file.
Repair or reinstall the complete Avast product.
“Bad Image”
A Bad Image message means Windows rejected the module or a dependency as invalid, corrupted, or incompatible. Avast-related examples have also appeared after Windows updates and damaged installations.
Use Avast repair before investigating Windows components.
Fix 1: Repair Avast from Installed apps
This is the best first step because it replaces or corrects the Avast components as a matching set.
- Press Windows + I to open Settings.
- Select Apps.
- Select Installed apps on Windows 11, or Apps & features on Windows 10.
- Find the Avast product actually installed. It may be Avast Free Antivirus, Avast Premium Security, Avast One, or another Avast entry.
- Select the three-dot menu on Windows 11, or select the Avast entry on Windows 10.
- Choose Uninstall. This opens the Avast Setup window rather than immediately removing the program.
- Select Repair.
- Follow the prompts and restart Windows when Avast requests it.
Repair can reset some customized Avast settings. After the restart, open Avast and confirm that its protection modules load normally. Then repeat the action that produced the DLL error.
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Fix 2: Remove and reinstall Avast cleanly
Use this branch when Avast repair cannot restore the component, when the installation is visibly damaged, or when an update left mixed files behind.
- Download
avastclear.exeonly from Avast’s official support site. - Save the tool somewhere easy to find, such as the Downloads folder.
- Right-click it and select Run as administrator.
- Accept the prompt to restart into Safe Mode when requested.
- In the Avast Uninstall Tool, select the installed Avast product and choose the removal or reinstall option shown.
- Let the tool finish removing Avast.
- Restart Windows normally if the tool does not do so automatically.
- Download Avast again from Avast’s official installer page.
- Run the installer as administrator and complete setup.
- Restart Windows once more if Avast requests it.
Repair the product listed in Installed apps. If Avast One is installed, do not reinstall an old legacy Avast package merely because an old folder remains on the disk.
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After installation, check the new Avast directory and test the application or Windows action that previously triggered the message. If the file is restored but the error changes to an entry-point error, restart again and install any available Avast application update.
Fix 3: Check Avast and Defender quarantine
A security product may have removed the file after an update or false detection.
Check Avast quarantine
- Open Avast.
- Select Protection.
- Open Quarantine.
- Look for
aavmrpch.dllor an Avast component with a related name. - Inspect the original path and detection details before taking action.
Restore the file only when all of these conditions are true:
- The original location is inside the Avast installation directory.
- The file identifies AVAST Software in its signature details.
- The Avast installation came from Avast’s official installer.
- A current scan does not identify the installation as compromised.
After restoring it, restart Windows and run Avast’s update or repair process. If Avast detects the file again, do not repeatedly disable protection. Submit the detection to Avast for analysis and reinstall Avast if necessary.
Check Microsoft Defender Protection History
- Open Windows Security from the Start menu.
- Select Virus & threat protection.
- Select Protection history.
- Open any item that refers to
aavmrpch.dllor an Avast folder. - Review the path and detection name.
- Use Restore or Allow on device only if you have verified the file and installation.
Microsoft warns that allowing a detected file can expose the computer to risk. If the file is outside Avast’s expected directory, leave it blocked and remove the suspicious copy.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsFix 4: Investigate Visual C++ only after checking the logs
Visual C++ is not the usual explanation for a simple missing Avast DLL. Investigate it when Event Viewer reports one of these clues:
SideBySidevc110- CRT
- activation context
- manifest
- a Visual C++ runtime load failure
To check the relevant events:
- Press Windows + R.
- Enter
eventvwr.mscand press Enter. - Expand Windows Logs.
- Select Application.
- Look for errors at the time the Avast message appeared.
- Read the Source, Event ID, and detailed description.
If the log specifically identifies an old VC++ 2012 dependency, install or repair Visual C++ 2012 Update 4 from Microsoft. Use vcredist_x86.exe for a 32-bit Avast component and vcredist_x64.exe for a 64-bit component. A 32-bit Avast component can run on 64-bit Windows, so choose based on the component named in the error, not only on the Windows edition.
Older Visual C++ runtimes can coexist. Do not remove a 2010, 2012, or 2013 runtime merely because a newer v14 runtime is already installed.
Fix 5: Repair Windows components only when Windows is also damaged
aavmrpch.dll is not a protected Windows system file. System File Checker is therefore not expected to download this Avast file from Microsoft.
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Use DISM and SFC when Windows itself is unstable, several unrelated applications report corruption, or system logs show broader component damage.
- Open Start and type Command Prompt.
- Right-click Command Prompt and select Run as administrator.
- Run:
DISM.exe /Online /Cleanup-Image /RestoreHealth
- Wait for DISM to finish.
- Run:
sfc /scannow
- Restart Windows.
- Repair Avast again after the restart.
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If SFC reports that it repaired files but aavmrpch.dll still fails, that result does not mean SFC should have restored the Avast component. Return to Avast repair or clean reinstall.
Fix 6: Do not reinstall a driver for this DLL
There is no evidence that aavmrpch.dll is a driver file. Do not use Device Manager or reinstall graphics, chipset, audio, or network drivers unless the error identifies a separate driver module.
If a separate driver is named:
- Press Windows + X.
- Select Device Manager.
- Expand the category containing the named device.
- Right-click the device and select Properties.
- Check the General and Driver tabs for the exact problem.
- Use Update driver or obtain the driver from the hardware manufacturer.
- Restart Windows and test again.
Hunting through Device Manager for unrelated stale drivers is slow and can create new problems. Outbyte Driver Updater can scan and show which drivers need attention; the driver installation is completed by the full version. This is not a substitute for repairing Avast when aavmrpch.dll is the named module.
What not to do
Do not copy the DLL into System32
aavmrpch.dll is not a Windows system DLL. Copying it into C:WindowsSystem32 or SysWOW64 can make Windows load an unrelated copy and can create new architecture or version conflicts.
Do not use random DLL download sites
A downloaded DLL may contain malware, have the wrong signature, target the wrong architecture, or belong to a different Avast build. It also leaves the rest of the damaged installation untouched.
Use Avast’s repair function, Avast’s official Uninstall Tool, or Avast’s official installer instead.
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regsvr32 is for DLLs that expose a self-registration entry point such as DllRegisterServer. There is no evidence that aavmrpch.dll is a self-registering COM component.
Running this command:
regsvr32 aavmrpch.dll
will generally fail or accomplish nothing useful. It does not repair a missing dependency, reconcile Avast versions, or reinstall the product.
Do not use Windows Features for Avast
Turn Windows features on or off manages optional Windows components. It does not reinstall Avast files or provide this DLL.
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Do not verify a game to fix an Avast DLL
Steam or Epic verification repairs files belonging to the game. It will not normally restore an Avast-owned component. Repair the Avast installation instead.
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If the error remains after reinstalling Avast
Record the following before contacting Avast Support:
- The exact error text
- The executable named in the dialog
- The full path shown for
aavmrpch.dll - The Avast product name and version
- The Windows version
- Whether the file exists after reinstall
- Whether its digital signature is valid
- Any
SideBySide,Application Error, CRT, or manifest events
If the error began immediately after an update and a restore point exists, press Windows + R, enter rstrui.exe, and review a restore point from before the change. Check which programs will be affected before confirming. Microsoft documents the process in its System Restore guidance.
For persistent Avast-specific failures, use Avast’s Support Tool or Avast’s support portal. A stale legacy Avast folder, a quarantined component, and a product defect can produce similar messages, so the exact path and event details matter.
FAQ
Is aavmrpch.dll a Windows file?
No. It is associated with Avast Antivirus and normally belongs inside Avast’s installation directory.
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Should I download aavmrpch.dll?
No. Downloading an isolated DLL is unsafe and may not match the Avast version or architecture. Repair or reinstall Avast from Avast’s official source.
Can I copy it into System32?
No. That is not its normal location and can cause Windows to load the wrong copy.
Does Microsoft Visual C++ always fix this error?
No. Repair or install VC++ only when Event Viewer identifies a matching side-by-side, CRT, or manifest dependency problem.
Is every aavmrpch.dll file malware?
No, but the filename alone proves nothing. Verify the Avast path, digital signature, and installation source, then scan suspicious copies.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsWhat is the correct fix for an entry-point error?
Repair Avast first, then perform a clean removal and reinstall if repair fails. Entry-point errors usually indicate mismatched or incompatible Avast components rather than a missing standalone file.
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