I can't figure out where to find out how much memory I've used and what is left available to me. Please help?

do you have in your programs :My computer: ? can you click on that and open property for info on memory ? That is where I found Mine,,system and maintenance under tools in that property

Well, if you bring up the "Task Manager" (control alt delete) it shows what your physical memory usage is (in percentage); you can click on the "Preformance" tab and it tells you how much ram you have and a bar graph that shows hw much is in use.