Problem with new board?

A while back I decided to upgrade my PC to what I consider to be a major upgrade. It was the first time I was going to spend lots more on a motherboard, CPU and RAM than I ever did in all my years of building my own PC.

I started with an ASUS Crosshair II Formula everything I read was leading me to believe this was the way to go. Unfortunately I didn’t read Tom’s Hardware about 780a boards until it was too late.

The first board had a dead set of memory banks. Something I later read was a repeated problem. I returned the board for a new one and all went well for about two, maybe three, weeks.

One day as I got on to surf around and maybe play a game I noticed my mouse was acting up. It is a laser mouse, and it acted as if it could not register anything to tell the mouse to move. It was as though I had pits of nothingness that the mouse couldn’t use to know it should move.

Then I realized that when I opened programs I could not click on anything for a period of time. After a while it was a mixture of both not being able to move the mouse or being able to click.

I tried this on the desktop alone, just seeing the mouse move only a little. I then right clicked to test the buttons hoping to bring up a menu… nothing.

I swapped out mice, but that didn’t help. I then decided to restage, thinking I might have a bug, but when the install of the OS (Vista) was complete, and no other drivers installed as of yet, the problem was still there.
I took my machine to a shop to have it tested. They could not find anything wrong with it. I could maneuver around using my keyboard with no problem at all. In fact, it got to the point that it was the ONLY way I could do anything.

I then sent the board in to ASUS to have them look it over and replace if necessary. They sent it back saying they could find nothing wrong with it.

While the machine was out I had used my other PC to searched around and found lots of folks having problems with this board. By the time ASUS sent the board back with no fixes, I was exhausted with the board. I was sad too, because when it was running good it was the best machine I ever had.

I sent the board back to where I bought it and got my money back. Then I bought another board, an MSI K9N2 Diamond. I’ll admit I am not as happy with this MSI board as I was with the ASUS when it was running in top condition, but MSI was good to me in the past, and I needed something to run my AMD Phenom 9850 Black with Corsair Dominator RAM.

All has been fine until this weekend. As with the ASUS, almost the same period of time has elapsed from when I put in the board to this problem is reoccurring.

I’m at a loss. I cannot understand what is happening, what is causing the problem, or why.
Here is the info on my machine. Any help in this would be very much appreciated.

BTW, all drivers and the bios are up to date.

MSI K9N2 Diamond (specs)http://global.msi.com.tw/index.php [...] 3_no=#menu
I do not use the onboard video or audio. They are disabled in the bios.
Corsair Dominator RAM (4GIG) (specs)http://www.corsairmemory.com/products/dominator.aspx
AMD Phenom 9850 (Black edition)
Two Seagate 250MB SATA setup with RAID 0
Creative X-Fi XtremeMusic
EVGA nVidia 8800 GTX (756MB)
Gateway monitor with USB hubs
Logitech G15 gammer keyboard
Logitech MX1000 Laser mouse
Logitech G7 Laser mouse
(I DO NOT run the mice together. I only listed both of them because they both had the problem. I am not convinced it is the mice that have the problem)