I tried it on another WS and had the same problem. So I tried
to use Volume Shadow Copy with NTBackup and got BSOD.
I found a link how to resolve the problem (
http://www.techspot.com/vb/topic94820-5.html )
After uninstalling all storgae volumes in device manager everything wored fine inclusive Power Archiver and open files.
So I did it also on the first WS and here also everything went
right.
But I cannot get PACL V7 to work with VSS.