TopWinPrio can change your application's priority. Mostly all applications in Windows are given a "Normal" priority. That means that all the programs run simultaneously and if you have a lot of programs running, all will run equally slow.

TopWinPrio checks every now and then to see what window is active at the moment. When it finds the one, it gives it higher priority than the usual normal priority. Once this window loses focus, topWinPrio gives the window its standard status back.

By default, TopWinPrio gives the active application a priority "AboveNormal", but not "High" as many programs do. This is due to the balance of giving the active window a higher priority, meanwhile not taking priority from the drivers.

TopWinPrio checks your windows once a second (that can be changed).
The active window will receive a higher priority than normal. When you shift to another window, the previous window will return back to its default priority and the new active window will now get higher priority.
Those settings can be adjusted from in the settings tab.
TopWinPrio will not boost itself; instead it will place itself in a lower priority class. It will also avoid boosting Windows Explorer since it's not needed to boost. If you really want to boost explorer.exe you can choose to do it in the settings tab.
When you run TopWinPrio it will only be able to change the priority of the applications you have started normally. It will not boost applications run with administrator rights.
To do so you will have to run TopWinPrio with administrator rights.

Requirements:
* NET Framework

The license of this software is Freeware, you can free download and free use this system utility software.