Ok boys and girls, this seems to be flumoxing me at the moment. Let me explain: I previously had Vista 32-bit installed on my OS hdd (Raptor X), and I wanted to change to 64-bit, but I also wanted to do a full format of the drive because, I Vista's wisdom it installs over the previous windows installs and keeps the files. I effectively had 3 windows installs on this drive so I decided to format it properly. I took the drive out, put it in my old xp rig and formatted it in there through disc management (it was given the drive letter E: in that machine), then plugged it back into my sig rig and proceeded to install 64-bit windows, allowing it to do it's own format (which is of course a quick format and not a full one). I then ran all of the updates and then Sp1 could be installed I did that as well. However, now when I take the windows disc out of the drive and set the boot priority to hard drive in the bios, it gives me the following message: "Boot Disk Missing, please insert system disc and press enter" (or something very close to that). I press enter and it just keeps showing the message. Next step is to put the Windows disc back in, restart, set the boot priority to CD, then of course it asks me if I want to boot from CD press any key (if I don't do this and just let it run through, then it gives me the boot disk error). So I let it get to the first page of installation, I cancel, it restarts, this time when the boot from cd prompt comes up, I don't press enter, and it boots into windows aboslutely fine. So now I take the disc out of the drive, restart, and get the Boot Disk error, but if I leave the windows disc in the drive it boots without issue. So you can see why I am confused I hope? What do you guys reckon? It almost seems as if it isn't seeing the drive as the windows until the windows disc kinda points it to it? Any idea's what to do? I couldn't find a low level format utility for my drive, that ultimate boot cd thing wouldn't full format.