Take ownership of all files on the drive with -> http://support.microsoft.com/kb/308421
-> What's missing in your post is why you ran that repair. Maybe there was the DAN VIRUS and the repair requires the DANDAN virus fixer software. But we can't tell as the story is a bit light.
I just ran "sfc scannow" on my system, this procedure requires the xp-pro disk. After process was complete i now have this problem of which I am now unable to completely boot up.The system freezes when the scroll bar is running across the screen. I tried using safe mode but here the worst thing is happening where my icon shows up and when i click on my icon the word "password" shows up but no window for me to write my passwod in and no matter where i click ,nothing happens.
System info is as follows: 850Mhz,XP-PRO, 1024MB