Your computer has been severely infected by worm, that is BLAH.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 BLAH.EXE as soon as possible.

Location : C:\blah.exe
Type : Worm
Dangerous : YES
Removal : Immediately

 
How to get rid of BLAH.EXE [ Manual Removal Method ]