All bat should run as adminstrator.
Usage:
1.copy the *.dll in env dir to "C:\Windows\System32" or any directory that was included by %PATH% .
2.Run SaveCurrentTime.bat,it will creat a time.bat at current dir.
3.Edit ChangeTimeTo_20170510.bat , set the time you want.
4.Run ChangeTimeTo_20170510.bat
5.When you want to recovery the system time,run RecoverySystemTime.bat,the time.bat will be deleted.