This computer could not install Service Pack 2. It kept stating that access denied. I found instructions to correct this error at the Microsoft website. After following the directions I got the same error. After many attempts I thought if I did a system restore that it may recopy the registry files to the default. Anyway, after it copied the windows files, it went to finish install by asking the normal, ie. time zone, etc. However when it gets to the finish, the hour glass appears and then it hangs up. Tried going to safe zone and got message that windows did not complete finish. Tried restoring again and then came to finish with same result. Any suggestions?