I have recently replaced my hard drive, the new hard drive i replaced it with is the 'Hitachi HDS721010DLE630 ATA Device'. I have recently started having random restarts without notice, and wondered if this is the cause of the problem as i have not had any software to install it, however as far as i am aware you do not need to install it by using a disk. Also when i troubleshoot problems with my computer i am getting 'hardware changes might not have been detected'. Any information that could help solve, or if this is not the cause of the restarts would be appreciated. Thanks.
More aboutpossible hard drive problems
The restarts sound like a power supply problem or perhaps memory.