How to Delete Your Application History in Windows 8 - How-To Geek. Like Whack A Mole, the multi-tasking tablet operating systems like Android have their benefits and their disadvantages. It is easy to load an app in Metro, and to switch back and forth between apps. This is because they never really die. They pause in suspended animation while you go do your thing in some other app. Then, when you switch back, the app doesn't have to load all over again. Good thing, right? Well, sometimes. When you fill your computer's memory with dozens of open apps, things can get clogged up. So, follow the instructions in this how-to to clear all open apps with a click of a button. Another way to do this is a hard reset; which clears the memory of all active apps. For now, just click through using the Windows key and the I key combination, and go to More PC Settings in Windows 8. Now, there, don't you feel better?