Time differences in Windows and Mac OSX

Installing both Windows either Vista or XP on the same machine can create issue related to time cause Vista uses the PC clock as the local clock as compared to OSX which uses the local time as universal time (GMT). In order to resolve this problem, we need to tell Vista that the local time is GMT. This can be done in adding an entry to the registry. Below are the steps required:

run -> regedit

navigate to:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation

click TimeZoneInformation and look for this DWORD:

RealTimeIsUniversal

if not exist, create a new DWORD.
Set the value to 1.

That's all.