most likely a virus or malware use malwarebytes to make sure ur pc isn't being hacker or any malware on your computer it's also pretty good at detecting them but not all the time you can also use it to scan the file for anything but do be careful what you download from my experience. You can also use windows and R and type in NETPLWIZ to make sure nobody else has access to your computer or control if you see someone else remove them asap because if someone else is logged in they can steal info and other stuff.