Windows 7 blue screen


I am getting blue screen errors nearly twice a day some times more. I have tested memory and it tests fine, all the hard drives test fine as well. I have a hunch its my video card and all signs point to it with it crashing as soon as I loaded the drivers, reloaded windows 7 and as soon as I installed the video driver blue screening again, and so on. However, I dont think its the video card. I also had all my usb drop out of no where and none of the USB devices worked. After rebooting 3 times it went back to working. I am leaning towards motherboard but read the blue screen and see what you think it means....

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.
Locale ID: 4105

Additional information about the problem:
BCCode: 1a
BCP1: 0000000000005002
BCP2: FFFFF70001080000
BCP3: 00000000000004EF
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Files that help describe the problem:

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If anyone needs the mini dump file ill post it after i get a reply
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More about windows blue screen
  1. Is the BIOS up-to-date on motherboard? I would try that first.

    Otherwise, you can try uninstalling and reinstalling all USB controllers in Device Manager.
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Windows 7 Blue Screen