Hi Donald,
Your system tray is the bottom right hand corner (usually, unless you moved the taskbar), it has the clock on it. To the left are all your sys tray icons.
To delete AppData:
C:\Users\YOURACCOUNT\App Data\Local\Temp (If AppData doesn’t display, go into control panel, file explorer options, and make sure show hidden files / folders is checked off”
Hope this helps!
- C