UNMOUNTABLE_BOOT_VOLUME
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One of my client PC showing a blue screen after the first boot of windows xp. Read about how to troubleshoot this issue from Microsoft support website, they wrote all the possibilities about this (UNMOUNTABLE_BOOT_VOLUME) blue screen.
This behavior can occur if either of the following conditions is true:
- Your computer uses an Ultra Direct Memory Access (UDMA) hard disk controller, and the following conditions are true:
- You use a standard 40-wire connector cable to connect the UDMA drive to the controller instead of the required 80-wire, 40-pin cable.
- The basic input/output system (BIOS) settings are configured to force the faster UDMA modes.
- The file system is damaged and cannot be mounted.
The purpose of this error message is to prevent the following two things:
- Potential data loss caused by using an incorrect IDE cable for the faster UDMA modes. An IDE cable is a kind of cable used to connect storage devices, such as hard disks, inside a computer.
- Continued access to a drive on which the file system is damaged
To repair the volume:
Boot from windows installation cd and choose repair (R) then go to Recovery Console. Administrator password is needed, press Enter if admin password is blank. In the console / command prompt type chkdsk /r. After the process finish type exit and press Enter to reboot.
If this step does not help. Try to go to Recovery Console again and do fixboot instead of chkdsk /r.
Check the IDE cable and load Fail-Safe settings if the above steps does not help to remove the blue screen from your system.
If your computer uses a UDMA hard disk controller, try these steps. If your computer does not use a UDMA hard disk controller, see the “Next steps” section for help.
- If your UDMA hard disk is connected to the controller with a 40-wire UDMA cable, replace the cable with an 80-wire cable.
- In the BIOS settings for your computer, load the ‘Fail-Safe’ default settings, and then reactivate the most frequently used options, such as USB Support.








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