Why automatically [automatically change time] setting in win8?!!

in win8 that I have been install it on my macbook pro, system time automatically change after each time i set correct local time.
i was disable automatic time in win8 configuration, but that's not work.
i have a same problem with my previews system between osx 10.7 vs win7. on that case win7 time was ok, but osx time wrong.i try several times to set osx time but each time changed time after restart.  I was disable all automatically options from both OS but my problem not solved.
now i need a help to manual set time in osx 10.8&win8 without automatically change...

The problem isn't so much that the time is changing as much as how Windows and OS X deal with time.  It will never be correct for both.  Windows sets your internal clock to "local time" which is the actual time you would use.  OS X uses a Greenwich Mean Time (GMT) offset.  Basically, OS X will set your internal clock to Greenwich Mean Time and then, based on your geographic location, it will add the correct number of hours based on your time zone.  So, for OS X, your internal clock will always be the same time regardless of where you are in the world and the OS adjusts it to display the correct time.  Windows actually sets your internal clock to your actual time.
So there is no way to have them both be correct... especially if you turn off auto updating.  If OS X was the last OS to set the time (so your internal clock would be set to GMT) and you switch to Windows (this should only happen with BootCamp by the way) Windows will display the GMT (which would not be correct for your local time).  Likewise, if Windows were the last OS to set your internal clock (so it would be set to your local time), when you switched back to OS X, OS X would "think" the internal clock is set to GMT and apply an offset so it would be however many hours your are from the GMT timezone hours off.

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