Re: Computer CPU Spikes, going from 0 to 100 and lag ensues (Could be Hardware)
well it could be a lot of things, imo. in relation to your HD specifically, idle processes like to expand your swap space periodically and that can cause a uptick in resource usage for a few ticks for instance. you can eliminate that itself I suppose by going into your virtual memory and setting it to a set value. personally for better performance, I always have mine on a separate partition, if not striped and on a faster area of my HD, but you can at least see if thats part of the problem, but just setting it to a specific size, ie exactly twice your memory, or 1.5X.
It probably isnt that though honestly, but it's worth a try.
it can also be a AV program.
What I'd suggest doing, is what I often suggest...get a live pocket OS like SLAX (From SLAX.org) boot up your system and see if its doing the same thing. if it isn't then you know obviously it isn;t a hardware specific thing, which it likely is not. once you know it's OS specific, which frankly 99% of stuff like this is, you can get to eliminating the factors, one by one. eventually you'll narrow it down, it just takes work.
Also, I might suggest optimizing your services, and starting with a clean install with a dual boot with a old install that has the problem. <shrug> good luck.
btw, I once ran a system stuttering periodically problem down to a keyboard jack problem where it was grounding out against the case. stuff happens.
btw, I'm with mac on guessing its your drivers probably. but probably doesnt mean definitely, so good luck.