i have an advent laptop, with a ram upgrade of 2gb, and a new 130gb hard drive (as oppose to the standard 30gb i used to have a problem where as on booting up it failed to find the operating system, this was solved by removal, tapping the hdd and re starting. but now it starts boots up as soon as the windows xp logo appears, it come up with a blue death screen and says something along the lines of unmountable boot volume. then it restarts and does the same thing again and again.... i dont have any recovery discs. the files on the drive are all backed on on my external hdd. help please.