Unmountable boot volume

[Darklifter]

I haven't used my computer in a long time and had it stored away, recently I tried using it again and it booted up fine the first time but the keyboard was off, so I shut it down and turned it back on, then a blue screen showed up saying UNMOUNTABLE BOOT VOLUME along with some various vague tips, and STOP: 0x00000ed (0x80EF8D98, 0xC000009C, 0x00000000, 0x00000000) the computer worked fine before I stored it away. I do not know anything about the hardware, I received it second hand. Any help would be greatly appreciated. Feel free to ask any questions and I'll try my best to answer.

 

[blues_harp28]

Hi, you will need the Xp install Cd.
Boot from the Xp install Cd. - when prompted press [R]
Choose Windows installation [typically by pressing [1]
When prompted for password.
Press Enter.
Type chkdsk /r
[note space after chkdsk]

When fininshed.
Type Exit
And press Enter.

The Bios needs to be set to boot [Start] from the Cd - it may already be set to do so.
http://michaelstevenstech.com/bios_manufacturer.htm
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Unmountable boot volume in Windows XP.
http://www.computerhope.com/issues/ch000630.htm