Maxtor!!! Hehehehe!!!!!! Not funy to you, I guess. Do This:
Type:
Run> CMD > chkdsk /p and enter
fixboot and enter
exit and enter
chkdsk /r and enter
exit and enter
This will do a surface scan of that drive and check for bad sectors and repair them. Sounds to me like that Maxtor may need an RMA. Your hard drive should have come with a cdrom utilities disk that will do a factory check as well.