Yes, after determining from reading the manual for my motherboard that came with my computer, I discovered that I could have a maximum of 2 gigabytes. My motherboard supports SDRAM and DDR sdram. I purchased two 1 GB sticks of DDR Ram (266 mhz, as recommended by the manual). I removed the old RAM because the book said my old SD RAM would not be compatible with my DDR ram. So all I have now is two 1024MB 266 mhz ecc DDR Ram. It's manufactured by Ultra, I ordered it from Tiger Direct.
Also, I discovered that Microsoft, on their website, has a program you can download that will physically test your RAM for defects. It does 11 different tests. I downloaded and ran that program, and there were absolutely no problems with the RAM.
I am 100% certain that what I purchased is compatible with my computer, that I installed it correctly, and that the ram is physically free from defects.
The system hangs after certain programs have loaded during bootup. Before I disabled several, it would load my firewall, my avg, and other software and then freeze. I disabled those programs from starting during bootup (except for avg, my antivirus software). There are likely more startup programs I can disable, I'm just not 100% sure which ones I safely can disable from startup.
But I believe it to be something, such as a driver, not loading correctly since I upgraded the memory. It's like the upgrade shocked something into not wanting to load when I normally boot.
If you have any ideas based on this I'd certainly appreciate them and am willing to try anything. I fear I may have to format and reinstall everything, and I don't want it to have to come to that.
What kind of RAM did you install? (DDR, DDR2.. etc.) Do you know what the max allowed ram is on the motherboard?