Time sync in Vista and Ubuntu
In a dual boot system Ubuntu time is set to UTC by default. The display time on Linux desktop is calculated based on the UTC (GMT) time of BIOS. Vista uses BIOS' time as local time, thus lead to incorrect reading for LT. To solve this issue use a favorite editor tool to edit /etc/default/rcS and change UTC=yes to UTC=no so that BIOS' time is set to local time rather than UTC.