• We hope you have a fantastic holiday season to close out 2025! Thank you all so much for being part of the Tom's Guide community!

cmd opens up from time to time

Have you scanned this system for malware and viruses lately? Do you have any games or applications installed from questionable sources (like a pirated/cracked game)?
 
Personally, I wouldn't trust your system. If it was me, I would re-install the OS from the ground up and then re-install all apps (only legitimate ones). Start from a clean foundation.

Do you have other systems connected to this network?