Recently users have reported that their PC started is getting a bit laggyand when they opened the Task Manager they saw that Wsappx is using almost 90% of the CPU
It's a part of Windows Store and Universal app and its role is to install, uninstall, updating apps from the store, and making sure that the apps are licensed.
Run a CHKDSK Scan
Solution 1
1. Search “Command Prompt” in the Startup menu, then choose Run as administrator.2. Click the Yesbutton for confirmation when the dialog box appear
1. Click on the Search icon2. Select Control Panel.3. Now look for Troubleshooting
4. In the left pane click on View all.5. And select Windows Store Apps6. After the troubleshooting is finished restart your PC and you will be able to get rid of Wsappx High CPU Usage.