| Sounds in part like it might be a power problem, IMO. The toughest part about troubleshooting computer problems is how in part can cause another. Virus issues would severely complicate any troubleshooting you might try. You might be able to save the hardware if you just backup your vital files and reformat, but your issues sound like they're probably a cocktail combination of one flawed piece of hardware leading to more unreliable hardware.
Take my system, for instance; I've slowly narrowed down the problems in the system. I had random freezing issues, usually with no clear indication of what went wrong. There were also issues where the system simply rebooted itself out of the blue. AFAIK, it was a possible combination of low resources, poor heat distribution, unreliable power distribution, and hard disk failure. Every time I replaced one faulty component, the issues lessened, but there was always more - probably mostly caused by the shady power supply. Years later, now, I've finally got a new PSU with a massive fan on the bottom of it, all new/4 times as much RAM, a better affixed heatsink, and a new low-heat/low-power HDD. Right now, it's working better than it ever has, but it took a lot of poking and prodding to get it totally stable. |