IE6 freezes when more than 1 window

When IE6 opens a second window it freezes my system -win me-so I have to reboot. Ive tonnes of ram and disc space so I dont think its memory probs. Cant even go to Win update page as that freezes when it searches for updates.Have tried reinstalling IE but no joy.Have dual boot and IE works fine in win2K.
Any suggestions?:)
 
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