could be multiple problems.
1. are you sure you connected everything correctly?
2. try taking out a ram stick and see if you still encounter the same problem.
3. is your harddrive running smooth?
Otherwise, it could be a bois problem, maybe updating it would fix the issue. just a couple of my suggestions
Desktop - DualBoot: Fedora 15/Windows 7 64bit
Netbook - Windows 7 Professional
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