lunat!c#: I haven't heard of any issues or had any issues with memory exception errors caused by RealTemp. If a fresh install of Vista fixes everything up then it has to be something else. Is your memory and computer 100% stable? Does it pass Prime 95 blend? If your hardware is OK then about all you can do is add one program at a time to Vista to try and isolate the problem. Usually if there is a problem, something will show up in the log files with the name of the program and time, etc. that caused the problem.