lock.dat

File lock.dat is malware or can be infected by malware:
WinFixer Adware, SystemDoctor Trojan
You must run antivirus software as soon as posible to check you computer.Also Be Aware of this dangerous files:

888.dll Information
File name rstvcpau.dll
Removing axvacwst.dll
svhost.exe Removal instruction
zwlvuzuk.dll Information