PC won't boot

[trudi]

Some pop up messages on PC for a day or 2, now says "unmountable boot disc" and cannot get on in any mode, safe or otherwise. What can I do?

[meta]

If your on windows XP:

• Boot from your XP CD and then press the letter R when you see the welcome screen. 
• Now you should get a dos command prompt.
• Type "chkdsk /p" (without the quotes) and hit enter. 
• After that type "fixboot" (without quotes) and hit enter
• Press Y at prompt
• Type "exit" (without quotes) and hit enter.

Your computer should reboot into windows now.

If you don't have XP then try and get to a command prompt to run a chkdsk ("chkdsk /r"). Otherwise your hard drive might be knackered.