Since you have the right time setting on your PC, you can try changing the CMOS battery because it's possible that the BIOS time is incorrect.
If it is OK then try this to Restore at an earlier time.
- Click Start.
- Point to All Programs.
- Point to Accessories.
- Point to System Tools.
- Click System Restore.
- Follow the instructions on the wizard to restore to an earlier point.
Let us know if the issue still persists.