ill restart my comp and have 92-94% of available system rescources. Then i'll go on simple little things like check my e-mail once or twice, check out e-bay or chat, and within an hour, my system rescources are all the way down to 25%, 10% or even less. sometimes it will say i have less than 2% available - and im hardly even running anything. and there is nothing running in the background except for a few bare startup essentials. what could be causing this problem?