I just put Win 7 on a friends pc. The install went fine. Then I used Dazs loader to activate and it worked great. I started to get Win7 updates then it wanted to reboot and it stops at a screen telling me to replace the "ntoskrnl.exe" since I'm assuming it has somehow become corrupt. I got the file from my pc and went to copy it over the corrupted one and I got the "you don't have permission" message. I turned UAC all the way down and tried to swap out the file again and still get the message. Any ideas how to remedy this? When I leave the Win7 cd in it will boot up. Thanks.