Ok, I have a Dell Inspiron 1100 laptop. I purchased 2 512mb DDR SODIMM pc2100 2.5v sticks of ram for it. The bios is updated to A32. This ram is compatable with this laptop. When I turn on the laptop the Caps lock, Num lock, and power LEDs will blink a few times, then the laptop shuts down. I've tried one stick, and two sticks, in one spot, and in another spot, and it's the same thing. When I put the old ram back in, it works just fine. Ask me if I need to add anything else so you can help me.