constant issue

Hello, I get constantly a BSOD after PC startup. I did not install new drivers or something in the last days. Could you please look at my dump files and specify my error? Thanks for your help!

One of the many reasons I skipped Vista was because of the constant Disk activity when idle. It appears that the same problem exists with Windows 7. I've tried the usual suspects like turning of indexing etc, but the problem it still exists. I'm 99% sure it's not the hardware, because I can play...