Dust caused by the motherboard does not recognize hard drive

A friend's computer is often unable to start, and occasionally into the system is also frequent crashes, preliminary judgment computer there is a problem caused by a virus or hard drive itself. Prepare in accordance with the first soft, hard, simplest to most complex maintenance principles to come up with the latest Kaspersky antivirus software on the hard drive killing, but using the boot disk into DOS mode, but the prompt can not find the drives, it appears that the virus is unable to carried out.

Restart the computer and into the motherboard BIOS, hard disk parameters inappropriate, but the automatic detection does not recognize the hard drive. Only seems to check the hardware, open the case, unplug the hard drive power cord and data cable is Read more