Hey everybody. So the full error code in blue screen after booting (after win7 loading logo) is: Had the autocheck bad boy as well: Eliminated it via registry. So, pretty much only 0xc000003a is left. Also, autocheck as I understand is just an indicator of a problem rather than a cause... Okay, some background: Have Windows 7 Ultimate x64, decided to install Linux Mint x64 (I am on it right now). Obviously, had to move some partitions around - that went well. At one point, I had nice dual boot with GRUB: Win7 and Mint. However, probably from having nothing else to do, I decided to be anal and react to this warning in Mint that I have a lot "...bad sectors...". So, I scanned/checked them and tried to repair on Mint. And that was the breaking point, I think. After googling a lot, I fixed up nicely my boot records, mbr... So I now I got dual boot sys as well, it is just that Win 7 gives me that autocheck + 0xc000003a I have tried the following: 1) Registry editing "Bootexecute"... 2) Tried tackling this hidden partitions issue in GRUB. AFAIK, they are not hidden. Although, not sure. Tried unhide(hdX,Y) - did not work ("select disk does not exist"). Here is a "fdisk -l" in Linux by the way: 3) repairing with windows 7 cd 4) setting the drive in question as active numerous times 5) some other desperate stuff as replacing identical autocheck.exe from different (but same cd) win7 instalations in case it was corrupt. 6) PTedit - doesnt work because win7 is x64 7) Checked the hard drive for any moved files in directories like found.00000 or similar It has been 2-3 days with at least 6hours each. I am running out of options and MS tech support sites don't help. If you need any further info to help, let me know. Thanks.