system
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The interest in this issue is unprecedented in my experience and I’ve been on the net since '91. Ya you can call me gramps. Anyway, thanks for the thought about the M/B drivers. The system seems to work perfectly EXCEPT for the shutdown/restart hang. It IS related to AVAST but it seems to be in relation to something else since when AVAST only is loaded at startup, there is no problem.
I rant he SFC earlier as Eddy suggested and it came up with one hit for setupx.exe in Windows\system which I will save in another spot, then replace from the CD to see if it makes any difference.
Thanks for all the interest and suggestions