because Windows doesn't allow you to format the system drive.
If you really want a fresh install just place the installation disk in the DVD drive then ensure that the DVD drive is your first boot device and reboot the computer.
When the DVD boots instead of performing the repair you simply choose to install and pay attention to the prompts. There will come a point where you can choose to delete the partition and install fresh - do so.
Ok, I am pretty computer-savy and I useually know what I am doing and more, but I am stumpted on this one. I am running a Dell XPS 600 Windows XP Media Center system(is this the same as Prefessional, except with more features?) and I have a DELL Operating System DVD (Not a CD-ROM) and I cannot boot into windows. This started when I wanted to boot into Windows Setup to preform a repair install. My computer gave me an error saying that I was missing hal.dll and I could not boot into setup. I went into windows and even though i did indeed have the hal.dll file, I thought maybe it was corrupt. Here's the part where I screwed up. I accidently replaced it with a Windows 2k hal.dll from DLL-FILES.com. I have a backup located on the drive, but I can;t get into Windows anymore now, either. It says that crucial system files are missing that are required for boot and that I need to contact my system administrator. So now I cant boot into anything but Recovery Console because I have it in my Bot Cfg. i tried to just format my drive and start from scratch by using "format C: /Q /FS:NTFS" and then I hit "yes" to format, but I does nothing and gives me another "C:WINDOWS>" prompt. I REALLY dont want to talk to some indian guy on DELL support for an hour, so do you uys have any ideas?