That's a new one. Possible corruption. Worth checking your hard drive. At the elevated (administrative) command prompt type "chkdsk" <enter> and see if it finds errors.
To get to that prompt In Windows 10, type "command" into the search bar (bottom-left of screen), then right-click on the result and choose RUN AS ADMINISTRATOR.
It should report that no further action is necessary.
As for Videopad, UNinstall, using this tool. Take care to delete ONLY Videopad entries. Then reinstall. That should give you a fresh start.