Ever since I installed Windows 7 on my machine I'm having a problem.
(I previously had Vista on this machine without this problem.)
Sometimes the system slowly starts to hang. At first, the active applications no longer respond (like games stop producing sound/drawing graphics) and then after a few seconds the mouse/keyboard also freeze up, eventually leading to total system failure.
The problem is very random. Sometimes it happens 3 times a day and sometimes there's like 3 weeks without any problems at all. It took me some time to find a pattern (especially since the Event Viewer doesn't list anything at the time of freezing), but I think I have finally found one.
I am currently closely monitoring CPU/RAM usage on my Logitech G15 keyboard (which has a program that shows the real time stats on the display). For the last few freezes I noticed that the CPU usage of the 3rd core of my quad core processor was 100% , while the rest was somewhere between 25-50%. It seems that whenever the 3rd core hits 100%, the system stops responding.
I have a AMD Phenom II X4 955 Black Edition CPU on a Gigabyte GA-MA790FXT-UD5P motherboard.
Does anybody have any clue if my diagnosis makes any sense and if it's a problem that can be dealt with? Luckily I save my work a lot, but I'd like to work without freeze-ups whenever possible