VIA AGP Bus Filter (viaagp) Service Defaults in Windows 8
VIA NT AGP Filter by Microsoft Corporation.
Default Settings
| Startup type: | Manual |
| Display name: | VIA AGP Bus Filter |
| Service name: | viaagp |
| Service type: | kernel |
| Error control: | normal |
| Group: | PnP Filter |
| Path: | %SystemRoot%\System32\drivers\viaagp.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\viaagp |
Default Behavior
The VIA AGP Bus Filter service is a kernel device driver. In Windows 8 it will not be started until the user starts it. If VIA AGP Bus Filter fails to start, the error details are added to Windows 8 error log. When the operating system startup is complete, the user is being notified that the viaagp service hasn't been started.
Restore Default Startup Configuration of VIA AGP Bus Filter
1. Run the Command Prompt as an administrator.
2. Copy the command below, paste it into the command window and press ENTER:
sc config viaagp start= demand
3. Close the command window and restart the computer.
The viaagp service is using the viaagp.sys file that is located in the C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 8 installation media.