Windows Vista Services

VIA AGP Bus Filter - Windows Vista Service

VIA NT AGP Filter by Microsoft Corporation.

This service also exists in Windows 10, 7 and 8.

Startup Type

Windows Vista edition without SP SP1 SP2
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Default Properties

Display name:VIA AGP Bus Filter
Service name:viaagp
Error control:normal
Group:PnP Filter

Default Behavior

The VIA AGP Bus Filter service is a kernel mode driver. If VIA AGP Bus Filter fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the viaagp service has failed to start.

Restore Default Startup Type for VIA AGP Bus Filter

Automated Restore

1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.

2. Save the RestoreVIAAGPBusFilterWindowsVista.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. Restart the computer to save changes.

Note. Make sure that the viaagp.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows Vista installation media.