Your computer has been severely infected by malware, that is AV1.EXE. This is quite dangerous and unsafe for your PC and there may be other infections on your PC. You should urgently check your PC and remove any malicious application including AV1.EXE as soon as possible.

Location : C:\Documents and Settings\All Users\Application Data\AV1\AV1.exe
Type : Malware
Dangerous : YES
Removal : Immediately

 
How to get rid of AV1.EXE