windows 7 unmountable_boot_volume


  • I switched my pc on today and was met with some weird bsod about CI.DLL.

    Everything worked perfectly yesterday.

    I restarted and chose the "repair now" option, the autorepair was doing something for a few minutes, and reported success, but after restart I again got the same bsod.

    So I thought that perhaps some update messed something and I tried to restore system (using recovery console) to last restore point. After about 20 minutes of restoring the action reported failure.

    Now the bsod changed to "unmountable_boot_volume".

    Autorepair fails. One of the details is "Missing OsLoader".

    I tried using bootrec but it doesn't find windows. "0 installations detected".

    There was no boot folder on a C: drive. I used the bcdboot command to create boot point (as I read on the internet) pointing to the c:\windows.

    But nothing changed, except that the boot folder exists now.

    I noticed that sata cable was loosely plugged in and perhaps this was the source of original error. But now how to recreate a proper boot point so that windows will start to boot?

    Thursday, October 28, 2010 4:19 PM


  • You may ensure that the hardware connection is fine, then run Startup Repair again to create boot records for the current system.

    If the issue is not resolved, upgrade your BIOS and try the above steps again.

    Tuesday, November 02, 2010 6:05 AM