My computer is blue screening during peak sales time!

If it's actually a memory problem your notebook is going to fail to a memory test program such as Memtest. Don't use the Windows 7 Diagnostic memory tool, it's very bad.

I don't know what do you mean by a test. If it is your GPU? Well, obviously your system won't boot up, right? Try to remove your GPU and start the PC, it should get you to windows, but I'm not sure if you need to have secondary GPU (like the one in the processor.) 1 my friend wasn't able to start it, but my another friend was. It was on Windows 98, he boot it up without the GPU, but it had many graphical glitches. Or try to insert it to a another computer? There are some ways for sure.