Vista - Window Explorer has stopped working

This is a new install of Vista Ultimate w/SP1. Intel DX48BT2 motherboard
with a Q9450 processor, 4 gig DDR3 1066 Kingston RAM, 2 SATA II hard drives.
This memory is on the QVL for Intel.

Twice I have installed Vista Ultimate w/SP1 and each time when I try to open
almost anything in the Control Panel, I get the message "Windows Explorer
has stopped working", the desktop crashes and comes back. If I try 3 or 4
times I might get the application to open. This is the only time I see
this. I do not get this message opening any installed application.

This MB replaced an Asus Striker II NSE. The Asus board never did this,
same disk used to install, same hardware in both machines.

I had two 9600 GT KO video cards in both machines. I did SLI in the Asus
MB, the Intel board doesn't do SLI, but I was going to hook up 3 monitors.

I tried removing the Nvidia drivers, that didn't help. I removed one of the
video cards, that didn't help. The programs installed are the same ones
that were installed on the Asus MB. AVG Internet Security, MS Office 2007,
Adobe CS3 suite. The problems showed up almost immediately before installing
most of the additional software that has been installed.

I tested the hard disk (for bad sectors) using a WD diag program, and tested
the RAM. Both tested OK with the programs used.

I have no other problems with the system, even things seems to run fine.

I tried going to the MS Knowledge Base, but there wasn't much help listed
for this problem.

I do have 2 gig of Corsair DDR 3 1333Mhz RAM. I have not tried that, but I
wouldn't think that RAM could cause something so specific and only this.

I have even seen some blue screens, but I think those were SpySweeper
related.

Appreciate any ideas you might have.

Thanks

...Chip..

click start orb then search cmd then right click and run as admin then type sfc/scannow

Anything else up your sleeve? I ran the command as you suggested and it
returned no errors.

Thanks


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