Does Minimizing a Windows application reduce memory usage? So says this blog. An interesting piece of information. "In any multitasking system, minimizing an application means that it won't be utilized by the user right now. Therefore, the OS automatically makes the application use virtual memory and keeps bare minimum amounts of the code in physical RAM.". Wondering how I missed this information so far. But I don't think the OS is doing the trick. A few applications (for example, Mozilla Firefox) exhibited no change in memory usage when minimized. So it would be the application, which is playing the trick.