I've got to side with SirP on this one. It sounds like your computer is just not able to handle that many windows open with IE.
Heh, I didn't pick a side?
I was just curious. If you have 256megs that explains it. If you have 512 you will be running close to using all your memory at idle.
At idle my computer takes up 300megs of memory. This is with the minimum software I want running on the computer. Antivirus, firewall, spyware, sound manager, saitek x45 profiler, ipodservice, gnotify, gaim,etc.. The biggest chunk of memory is taken up by explorer, then firewall, then gaim, then antivirus, the ati's stuff. Then if bit torrent is running that becomes number one.