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#21
You can try this;
A23x86.iso
boot it up, then use nt6repair to reveal the shadow copies. Find the shadow copies first.
Then rt click the sick windows partition , select "bypass permissions". Then delete the following from the partition ( one at a time).
Program files
Program Files (x86)
Program Data
Users
Windows
You can copy the same named directories back onto the partition from the shadow copy ( do it one at a time, coz some may be quite big )
If nothing in the shadow is damaged, you should be back to the point when the shadow was created. I have done it several times.