Recently after installing my 634 USB unit I've been getting Perfnet and Perflib errors under Aplications in Event Viewer in WinXP. I unplugged my 634 USB and disabled the CC software from booting up on start up and that seemed to have gotten rid of the issue. Also my pc is stable again. I noticed when I have my 634 USB unit installed and those error msg's appear my pc would "sometimes" just freeze up. This happened twice already. Anything I could do to fix this issue? 
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