I have an HP Probook 6550b, i5 M450, 2.4 Ghz, Win 7, 4GB RAM, with a 16GB readyboost drive.
For quite some time, it has suffered from periodic hanging and freezing. There is no pattern to what software I am running at the time or what I am doing. Sometimes it hangs, and I can regain control; sometimes it just freezes and I have to turn it off with the switch. I have run System Mechanic, Advanced System Care Pro, Reimage, driver checker and update utilities, and other cleaner / repair utilities. Nothing seems to make any difference.
I have "Who Crashed" running, and there's never any crash dump info.
Sometimes I suspect the graphics driver or chip. I don't know much about it, but it seems that the computer has trouble redrawing the screen fairly often.
I am at the point of a new computer, but believe this must be solvable. What should I be looking at?