100%ish CPU when scanning drivers

100%ish CUP when scanning drivers
Intel Core 2 Quad Q8200
Vista HP SP1
CIS 3.8
Start A Scan and when scanning drivers it always happens 100%ish CPU after drivers have been scanned it falls to normal levels.
Cant do anything about it
Defense+ Safe Mode Firewall Safe Mode
Administrator Account
Vista UAC Enabled

*Screen Shot Attached

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