BIOS / Boot Up Problems

	BIOS Display Error		Master Boot Record Corruption		Windows Blue Screen Dump
	Blank Screen At Start Up		Unmountable Boot Volume		Windows Failed To Load Due To Missing Files
	CMOS Checksum Error		Missing NTLDR		Invalid Partition Table
	Invalid Boot.ini or HAL.dll		Windows Boot Up Errors

Related Topics

Unmountable Boot Volume

Observations

Symptons
You start up Windows XP and receive the following error message, where aaaaaaaa, bbbbbbbb, cccccccc, and dddddddd are hexadecimal numbers that may vary:

STOP 0x000000ED (0xaaaaaaaa,0xbbbbbbbb,0xcccccccc,0xdddddddd) UNMOUNTABLE_BOOT_VOLUME

Causes
This behaviour can occur when the file system is damaged and cannot be mounted. More commonly it is due to a corruption in the BOOT.INI file.

Resolution

Microsoft includes a disk utility CHKDSK that detects and repairs any minor system corruption. To do this, use the following steps:

1. Enter Windows Recovery Console
2. At the command prompt, type: chkdsk /r
3. Hit Enter
4. When the repairing process completes, type: exit
5. Restart your computer

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