Your computer has been severely infected by rogue software, that is AV.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 AV.EXE as soon as possible.

Location : C:\WINDOWS\av.exe
Type : Rogue software
Dangerous : YES
Removal : Immediately

 
How to get rid of AV.EXE