Thanks for all the comments, I was brave enough to open the case, and I found out that the memory modules are Japanese made, from elpida. It is true that this system was pre-made from HP, so i think i am going to ask them to do the dirty work, not that I have the capability and know how to do this anyway. But I swear man, I don't understand why HP put a big metallic casing right on top of the memory modules, it will be difficult to take out and replace the memory stick!

But I did find that G.SKILL modules from Newegg are like 57 bucks for a 8500 4G stick. So, it is not too bad, I do want to buy four sticks, that would give me 16G ram and replace/retired the 2G sticks .

I upgrade or updated my video carddriver, and i still have the error 132 when I switch instances.

Thx again for the recommendation and comments.

SaraiE