If your computer is not booting with the two RAM sticks, the problem might be with your RAM sticks or the RAM slots. In this case, you can do one thing. Insert only one RAM stick at a time and start ...

I had a nicely working dual boot windows 7 (which I pretty much only use if I want to use my photo printer) and Ubuntu 10.0.4 Linux system working until about last week when Linux suddenly stopped ...