Notepad started running script and toolbar changed position.

My windows 10 computer with (according to windows defender) no virus, started running script on notepad and my files were open. The toolbar switched position and everything looked strange for a short second. My immediate instinct was to shut down the laptop. When I turned it back on everything looked normal but I put on airplane mode. I went to recently opened files and nothing was new. I had to change back the toolbar position though. I ran a windows defender scan and it found nothing. Can I trust the computer? What precautions should I take? Was I hacked?