I am new to Ubuntu (10.10 64bit) and have purchased a new hard drive for its installation. I am running Windows 7 Pro 64 bit on the other drive. My goal was to keep drives independent of each other. My problem is when I go into bios and switch drives to make the Ubuntu drive the primary then switch back to Windows 7, the clock functions for Windows are way way off and need to be reset. Thanks for your help.