Heat does cause parts like hard drives to fail sooner so if this was on my bench I'd give it a quick cleaning with the cover off and a little canned air.
Back to the bench and see if our hard drive diagnostics work (these are maker/model specific so I can't tell you more about that.) If the hard drive failed we put in a new one and use the recovery media.
Help. When computer was turned on yesterday, the following message appeared on black screen:
"DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER". I was not home at the time and do not know if anything else occurred prior to this. System had been making a loud fan type of noise off and on recently. I believe this is Windows Vista system. A friend mentioned it may be power supply but I don't want to mess with anything without some "expert" input. When first turned on, blue screen does appear with options for F10-setup, Esc-Boot menu, F11-system recovery & F9-diagnostics. Can get into setup and boot, but don't know what to do from there. Any advice?