Here is what I have on this subject>>
One unfortunately common problem is data corruption on a hard drive and the dreaded "Unmountable Boot Volume" error. While the easiest thing to do may seem to be to format the drive and start from scratch, there is a better way of doing it, as long as you have a Windows XP installation disk handy. Read on to learn more.
Computer hardware wears out over time, it’s a fact. Your hard drive works constantly reading and writing data, and this (among other factors) may cause errors on certain parts of your system.
If you receive the "unmountable boot volume" error and have an installation disk, you still have a chance to save your system.
1. Insert your XP installation disk into an optical drive and boot up your computer.
2. When you see a welcome screen, hit the R key on your keyboard. This will enter you into recovery mode with a DOS prompt.
3. Now type chkdsk /p and hit Enter. This will launch a utility which will check for errors on your hard drive.
4. After the process is done, type fixboot and hit Enter to repair any damaged boot files which may have become corrupted. When asked to say yes or no, type the Y key on your keyboard.
5. Type exit and press the Enter key to reboot your computer.
If all went well, you should now be able to boot back into Windows without a problem!
