Hey! I'm trying to fix my friends computer and it's on old IBM T21. When I boot it up it shows the "IBM Think Pad" screen. After that it shows a red message saying "Hard drive not installed, if no Operating System found. Re-install Hard Drive...Press Enter". So I tried to install Windows XP and it shows the blue install screen and opens all the files...and then it says "Setup is starting windows" and it just sits there. I tried to re-install the HDD and then windows again. Same thing. I'm pretty sure that I downloaded the right HDD install...Any help?