Windows 8 : (Error The Boot Configuration Data file is missing or contains errors)

Make a system repair disc from another win8 computer with same number of bits as yours.   Or borrow one or any win8 install or upgrade disc will have the repair environment option on it as a choice.   I've read that win7 system repair disc (of same bits) will work too.

Boot from it and Try the automatic repair.

Try your win7 CD if the same bits .  Use its startup repair option once you get booted to it.  Or you can use its Command Prompt and the following command, becareful with the spaces ;

Bcdedit /set {bootmgr} displaybootmenu yes

That command will enable the F8 key to function on your win8 start up.

Hi,

It appears that you were able to get the command prompt, so give this a try...

There is a easier way to do this, but sometimes when you have multiple partitions, the .CMD can't find the right one... I haven't personally tried this, but have received replies that it worked.

Hi,

When you have extra partitions\drives, the drive lettering sometimes gets scrambled as compared to what it is after booting.

You seem to have figured it out, but from the CMD Prompt, type in Dir *:\, where the the * represents a letter from C:\ to how ever many drives\partitions you have. BTW...There is a space after Dir...

Confirm which drive letter is currently assigned to your windows partition, and substitute it for the C:.

Also,   It is possible that the reason that "F:\" is inaccessible is that your boot loader (Ubuntu?) has marked it as "Hidden", and possibly "Inactive".  This is common in some bootloaders to keep the unused OS from interfering and\or becoming corrupted...

If this is the case, you may need a 3rd party partitioning\disk management program on a bootable CD to "Unhide" it and make "Active".... Being "Active" may not be necessary. I haven't played with this lately to remember specifically.

/usr/bin/udisks --mount /dev/sda4 command but how do I mount it in Windows CMD? And the F: drive is not hidden and I am using a live CD of Ubuntu.

Hi,

When you get to the command prompt, type in F: and hit enter...

Then try accessing the repair commands I mentioned, or GoBonkers... except use F: instead of C:

Ubuntu and Win 8 are a bit different I think... I know nothing about Linux...

It could be hidden for Win 8, and Linux doesn't  "Recognize" the windows setting...