HP notebooks that use Microsoft Windows XP without XP Service Pack 2 installed may start with the following error:
STOP 0x000000ED (0xaaaaaaaa,0xbbbbbbbb,0xcccccccc,0xdddddddd) UNMOUNTABLE_BOOT_VOLUME
This error is related to the way Windows XP interacts with the hard drive during an unexpected shutdown. Sometimes the contents of the cache are not written to the drive properly causing the error to appear when the notebook restarts.
This document provides instructions to repair your notebook PC and prevent this error from reoccurring. Once you have repaired your notebook PC, be sure to follow the steps to prevent the error from occurring again.
View the knowledge base article from Microsoft, Stop 0x000000ED Error Message When Volume on IDE Drive with Caching Enabled Is Mounted (in English) and the Microsoft Help and Support article, Unmountable Boot Volume (in English).
Repairing the notebook PC when the error occurs
The following repair options require the HP Operating System disc that was included with the HP Notebook PC. If you have misplaced or lost your disc please view HP Notebook PCs - Obtaining a Recovery CD or DVD set to order a new disc. For customers in Europe, Middle East, and Africa please refer to the HP support document Europe, Middle East, and Africa - Statement on the Availability of the Recovery Software on CD . For other countries/regions, contact your local HP support center for information about obtaining recovery CDs.
Option 1:
Use CHKDSK from the Recovery Console
Start the computer with the HP Operating System disc in the CD or DVD drive.
Press any key when prompted to boot from the CD or DVD.
A blue screen will appear and several files will load. This process takes about 30 seconds to complete. You should not have to select anything from the keyboard.
At the blue setup menu, press R to Repair a Windows XP installation.
At the C: prompt, type chkdsk /r . This repair process may take 30 - 60 minutes depending on the size of the hard drive and repairs needed.
After the chkdsk completes, type Exit at the C: prompt.
Windows will restart. Eject the CD or DVD and it should continue normally.
