SuperFetch is a service in Vista that caches applications to increase their startup performance. Great idea but for me seemed to be problematic. In previous posts I stated that I had purchased a new 8 GB computer. On this computer I do a lot of development, using VS, and VM products like VMWare and Microsoft Virtual PC. For the first time while compiling a SalesLogix Web client instance I had an out of memory error. Looking at my memory usage I had less then 10MB available. When I looked at my total/cache values the Cache was 5GB+. Given that I run some pretty memory heavy applications the cache seems to me at least that it does not play completely nice. Turning of the SuperFetch service seems to have put the computer in a better place.