Win7 cannot modify time zone and times

Computer with the Win7 system, debugging the program today, want to change the time, only to find that the change Time zone button Point has not responded, the modification time of the button is gray, can not be saved.

Search on the Internet, think it should be used Ghost installation system problems, but also found a solution, tried, can use.

-------------Copy the following text to a new. reg file you can double-click Import to------
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\china Standard Time]
"Display" = "(gmt+08:00) Beijing, Chongqing, Hong Kong, Urumqi"
"Dlt" = "China Daylight Time"
"Std" = "China Standard Time"
"MapID" = " -1,75"
"Index" =dword:000000d2
"TZI" =hex:20,fe,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00