Mayonaka,

Please try running the "Error Checking/Chkdsk" program. The link below will help:

How To Run 'Error Checking/Chkdsk' On Win2000/XP

It might fix some of the problems that occurred.

If that doesn't get it, then you may want to use System Restore. Click on Start-All Programs-Accessories-System Tools-System Restore. When the SR window loads, select the "Restore My Computer To An Earlier Time" option. When the calendar comes up, choose a day when the computer ran correctly, then follow the prompts to restore the computer.

Hope this helps.

Grif