Re: Cant install ubuntu 11.10 on my HP DV2 PLEASE HELP!!!!
Well /dev/sda is generally your primary hard drive, so it's likely that the error you got in Windows was from a failing drive. If you are booting from the USB key into a live image it's probably doing hardware detection and getting hung up on the bad hard drive.
If you want a lazy solution and you don't mind opening the computer, temporarily disconnect the hard drive (I think it's user accessible from a door on the bottom) and see if the live image will boot. Otherwise, the suggestion about GParted would be the more thorough thing to do.
Acer Aspire X1930 running 11.10