I've got 4 hard disks (1 system, 3 storage) that are varying degrees of full from 25%-85%. Occasionally, my system will just bog down and I can hear what sounds like a hard drive winding up or something and my system locks up for maybe 5 seconds and then I can use it again. This seems to happen most often when I am opening or scrolling through a large database (it happens in Windows Explorer, J. River Media Center, iTunes, Windows Media Player, several other applications) My install is fresh Win7/64 bit. I've got 7200rpm drives, a decent video card, 8 gigs of RAM, a quad core processor, etc. etc. so there's really no reason I can think of why my system would be jamming up... especially when all I use my computer for is very basic things (email, media playback, internet, occasionally MS Office) Any ideas?