Your computer has been severely infected by malicious software, that is DFXOVL.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 DFXOVL.DLL as soon as possible.

Location : %System%\dfxovl.dll
Type : Rogue Software, Trojan Horses
Dangerous : YES
Removal : Immediately

 
How to get rid of DFXOVL.DLL [ Manual Removal Method ]