hello. I'm having a weird issue where my laptop shows 100% cpu usage. I had it replaced with another pc, and it's doing the same thing. it's random, and it happens while idle. I've tried a couple methods to determine cpu usage. weird thing is that when it shows 100% cpu usage, all processes don't seem to add up to that. this is especially prevalent when using firefox. I've had some issues with the internet especially when it's at 100% cpu usage. when it's that high, the internet runs at dial up speeds. my new pc seems to run the internet pretty well, but it still shows 100% cpu usage at random times. could an old router's signal, even if not connected to it, cause this problem? I mean the wifi signal. thanks!