Correct the time in Windows installed on Macintosh BootCamp

Since Leopard, Apple has BootCamp built-in on Mac OS; it’s a great utility to help you install Windows on Mac with ease. Whenever you would like to use Windows with “maximum power”, just hold “Option” key when you boot up your Mac and then choose “Windows” to boot from. If you are aware of the time, you will find out the time in Mac OS and Window is never the same. If you set the time in Mac to be the correct one, then the one in Windows is not correct any more even if you just reset it.

The reason why this happened because Windows is not using the BIOS time as the GMT +0 time, here is one solution you might be able to solve it.

1. Boot into your Windows partition;
2. If you are using Windows XP, type in “regedit” in “Start”–>”Run”; if you are using Vista, simply turn on your Command Prompt and type in “regedit”;
3. You will see your register list, follow the menu tree down to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\, then right click your mouse and add a DWORD Value:
4. Name the newly added Value to be “RealTimeIsUniversal”:
5. Modify the value by right click the name and choose “Modify” (Shown in above picture);
6. Set the value to be 1.

Now your Windows will use the BIOS time as the GMT +0 Time Zone, and both of your system will have the same time.

[Update]:According to Lebokov21,  this method works for Linux as well; if Microsoft doesn’t show the correct time for you but Linux or Mac does, give it a try.