Windows bootloader damaged?

Using dualboot after the re-install of Debian Microsoft Vista could not be loaded anymore. It left me with a black screen stating that: c:\Windows\system32\winloader could not be found.

– For this I used a vista 64 installcd. (use x86 version if applicable) booted into recovery-mode which did not help me very much. At least it gave me terminal, which was all I needed. After reading through Microsoft technet I found a possible solution for this:
– From the prompt I entered the following command to check the BCD-file:
C:\Windows\System32\bcdedit /store c:BootBCD /enum
(It found my Vista install on C:)

It showed that something had corrupted the BCD-file setting some parameters to “unknown”
After entering these commands it worked again:

c:\Windows\System32\bcdedit /store c:BootBCD /set {bootmgr} device boot
The operation completed successfully.

c:\Windows\System32\bcdedit /store c:BootBCD /set {default} device boot
The operation completed successfully.

c:\windows\system32\bcdedit /store c:BootBCD /set {default} osdevice boot
The operation completed successfully.

Check with:
C:Windows\System32\bcdedit /store c:BootBCD /enum

Reboot!

source: http://technet.microsoft.com/en-us/library/cc709667%28v=ws.10%29.aspx

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