I am trying to install win xp pro on a dell optiplex gx240 model dhm  p4 256 mb 20 gb with a dell resource reinstallation disk. It goes thru the sequence, detects partion, I formatted, and then it starts copying files. Now the problem. After about 2% it starts not wanting to copy files. They end with .ttf .inf .dll  I tried to hit escape to skip but there are too many of them and then I get a screen that says there is a problem somewhere. I realize this but what??