Clearing the TEMP Folder

TMP and TEMP

Close all applications and make sure your files are saved

Open File Explorer

Enter %TMP or %TEMP% in the Address Bar

This should take you to a file path similar to C:\Users\Scott\AppData\Local\Temp

Remove the data in this folder (or rename it to Temp2 if you want to keep it around)

Windows Temp

Go to C:\Windows\Temp to remove the global temp folder, if that is needed

Caution: Open Apps

Note: deleting temp files is safe, but if Windows OS shows a popup indicating that the file is in use, then do not delete that file because an open app is using that temp file