Okay so I have 32-bit windows. As you probably know, my computer is a piece of sh*t. I have 2 1/2 GB of RAM and would like to upgrade to a full 4GB. But as you may know, 32-bit systems can only read up to 3GB. I was wondering if I could simply buy a copy of windows 64-bit, or do I have to have a totally different motherboard or BIOS? Also, do the 1/2 GB of RAM is effecting me at all? I've asked around and some people say yes some people say no.