NEVER put a link on this webboard to (suspected) malware!!!
Delete the files Tarq mentioned
Also search for (and if found delete) winuqw32.dll
Open the registry editor and navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell
The value should be: "explorer.exe"
If it is not, restore it.
Close everything and reboot.
Run
CCleaner and let it check/fix registry errors.
Reboot