Your computer has been severely infected by malware, that is YHAFD78AUHD.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 YHAFD78AUHD.DLL as soon as possible.

Location : C:\WINDOWS\System32\yhafd78auhd.dll
Type : Malware
Dangerous : YES
Removal : Immediately

 
How to get rid of YHAFD78AUHD.DLL