WSAPPX is a process that runs in the background on your Windows 10/8 computer as a part of the Windows Store and the Universal app platform of Microsoft. It is used for installations, updates, and uninstallation of Store apps, so once you are done installing all updates, you don’t need it. But at times you may face situations where you find that this process is using high disk, CPU or memory.
Here are a few things you can try to troubleshoot and fix the issue: