The good news is that it was the motherboard -- the bad news is that the new system is quite unstable. What I have now is the following --
Asus P5Q SE plus mb -- with latest bios
Intel 9550 -- 2.83 GHz quad core cpu
HyperX DDR2 8500 memory
Pony SSD 480 Gig HD
Everything except memory is new for me -- altho only the SSD is actually new. When I first assembled system, with old regular HD (Western Digital 500 gig) -- it would not boot and said I had a corrupted file. Called my University tech -- as they install windows and told him to do a repair install -- and then clone the HD on to the SSD. He said problem was bad memory and removed 2 gig -- I had the four banks filled with 2 gig sticks. He cloned the HD and reformated the old drive (which was unfortunate -- I just wanted it removed).
Now system boots and runs quite fast due to the SSD -- but not infrequently get BSOD -- and quite frequently outlook or work or firefox will freeze and shut down -- outlook says problem with a file -- but going thru their fix does not help -- tried a repair install of office and that did not help either. Univ tech suggested I might still have bad memory -- or bad MB etc and suggested I get a new computer. Do not have the funds for that.
Suggestions anyone?? Thanks