MEMORY_MANAGEMENT can be for a number of reasons, faulty hardware, the way values are handled by software and the RAM getting full and switching to pagefile. THe hardware is normally the most common. If you want to keep the blue screen up without rebooting you can set this in the performance settings by right-clicking on my computer. I only ever got MEMORY_MANAGEMENT once and that was because I had 40 applications running at once and the PC/vista couldn't handle it!