uninstall the Virus TI again and the USB driver. Re download 108. Then go in to Device Manager uninstall all the items under Universal Serial Bus controllers using the right mouse button on each highlighted item.
Immediately reboot. Windows XP will reinstall all your USB drivers. Then re install 108 , This should get rid of the blue screen i hope! Let us know how you get on? 
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P4 3.6Ghz, RME Multiface, CubaseSX3.1.1+VST's, Virus TI Polar, TR909, TB303, Moog, EMS, Waldorf, Kenton pro2000.
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