Hello. I installed Windows 7 Professional on my MBP. Usually, there is no problem in syncing the clocks between Mac OS and Windows 7 (as long as the computer is connected to the internet during the switch). The problem is that I have no internet access outside school. For example, if I run Windows 7 at school, turn it off before leaving and reboot to Mac OS at home, the clock in Mac OS is incorrect. If I put Windows 7 to sleep/hibernation mode at school, go somewhere else and reboot to Mac OS, the time is incorrect. Is there a way to solve this issue? Thanks.