"Where can I find the Bios and what do I look for?"

Such updates are from the system maker such as Compaq/Dell/other or if a machine that was made, the motherboard maker. You can call the place that sold you the machine to verify these items.

"When I boot up I get a 512, I am sure that is not it."

When I boot up I get more than a 512. Much more is on the screen which helps me tell what's going on.

In closing, you post is far too light in information.