You can DISABLE DEP (see google.com) until you research if there are newer drivers for your products.
Before doing that, get another opinion about pests with EWIDO and HOUSECALL then eject what they find.
Finally, usbman.com covers many usb trouble areas but that's all I write given only this amount of detail.
I try to keep my laptop clean, but boy, it is a mess! When I boot, I get about six pop-ups that are Data Execution Prevention (DEP) errors? Now, when I plug my camera into the USB port, I get the "*********" (or is it "**** ding") sound, but can't access it or see it anywhere. I've tried multiple USB ports, new cable, etc. Just read where it could be a virus -- I run AVG (free) and ran Trend Micro scan last night. Still no good. Are the DEP errors related to the camera detection issue?? Help!