>When I first assembled my current desktop machine with 8GB RAM I had a couple of blue screen crashes. I tested my RAM with MemTest86+ ( http://www.memtest.org/ ) and discovered a bad stick in the 4 - 6 GB range, which was causing intermittent crashes when I ran lots of apps and a virtual machine using VirtualBox.
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>Free download, it creates a bootable CD, can test more than 4GB RAM - highly recommended.
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>If it turns out you have failing RAM, you might want to check that your RAM is not being overclocked.

Thanks