libvirt users - Jul 2014 - all windows vm could not start because the following file is missing or corrupt

Hi,

    After some problems in the server I can't start windows XP virtual
machines.
- Yesterday we got full disk  (100%). I deleted some files. Solved.
- I update Centos 5.6. I guess libvirt was updated from 0.9 to 0.10.
We have to use this kernel: 2.6.32-042stab079.6
because this bug is not in the release:
https://bugzilla.openvz.org/show_bug.cgi?id=2915

 Now, I try to start windows XP machines and all give me same error
could not start because the following file is  missing or corrupt
c:\WINDOWS\SYSTEM32\CONFIG\SYSTEM

If this error were in a particular VM I try to solve it manually, but
same error in three diferent VM is not a coincidence. I suppose it is a
upgrade issue.

What should I do?

 Thanks in advanced,
   Lucas