Your computer has been severely infected by worm, that is SYS_VD4.DAT. 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 SYS_VD4.DAT as soon as possible.

Location : C:\Program Files\Common Files\System\sys_vd4.dat
Type : Malware
Dangerous : YES
Removal : Immediately

 
How to get rid of SYS_VD4.DAT