Widely documented issue. Try:
http://www.google.com/search?&q=Voltrack
Sometimes when I turn on my computer I receive this OE:
0028:C003C17E in VXD IOS (01)+ 0000186E Called From
0028:C182AD08 in VXD Voltrack (04)+ 00000A18. Every other time I go to shut down my computer it will not acknowledge and I have to turn it off and back on again for it to respond.

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