i made some registry permissions changes (on HKLM) trying to correct an Office 2010 error. got a BSOD and now am getting said Blue Screen just after Win7 starts loading. i'm able to boot into an alternate Vista install on C:. 7 is on D:... my Win7 boot disk says 'couldn't find NTLDR, which seems odd? i read that that's an XP error, that 7's error should be can't find bootmgr (bootmgr is missing from D:, i think) please anyone help so i don't have to format D: ??? thanks why the heck would my Win7 Boot disk say 'can't find NTLDR' from bootup?