Your computer has been severely infected by Trojan Horse, that is TDSSSERF1.DLL. 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 TDSSSERF1.DLL as soon as possible.

Location : C:\WINDOWS\system32\tdssserf1.dll
Type : Trojan Horse
Dangerous : YES
Removal : Immediately

 
How to get rid of TDSSSERF1.DLL