How long did you wait before nothing happened? sometimes the Hard Drive will chugg over for a while before any activity takes place.
Sounds long but retry the install, same method as the first time.
If the same Halt occurs turn off the computer then unplug all un-necessary hardware.
Modem
Network Card
Sound Card
Extra CD Roms
Extra Hard Disks
Turn on the computer and see what happens, If it starts then one of your hardware devices is causing a problem.
If it doesn't then you might have to Format the Hard disk. WARNING: Formatting your disk will lose you everything.
Try plugging in the hard drive to a working computer to back up anything you do not want to lose, like your 10Gigs of MP3's
THINK BACK!
what did you install last before your computer went crazy?
what program or peice of software did you you last?
What did you download last and where did you get it from?
If you do remember any of the above then this may be what is causing your problem, problems like these usually occur when you install new device drivers or install new hardware.
It may be a simple case of having to Flash your BIOS. This happened to me when I bought more RAM and my computer simply said no, I didn't understand and thoguht the module was broken because my computer was great and should be able to cope with a GIG of RAM.
Flashing the BIOS resolved the issue.
You can do this without going into Windows. Download the file from another computer and follow the instructions carefully. If you mess up a Flash of the the BIOS you may need to buy a new mother board.
Most Flashes involve you using a boot disk and doing the flash from a DOS or DOS emulated Prompt (looks like the Recovery Console)
Good Luck!