Why Does the Command Prompt Open Unexpectedly on My Computer?

January 19, 2026 3 answers
Asked by CuriousPineapple72
I was playing Hollow Knight when I noticed that the Command Prompt opened for just a split second and then closed. It seemed like there was nothing in it. Could this be caused by something? I've already scanned for viruses and found nothing. Recently, someone logged into my Steam account, and now that same person has access to my friend's account from the same PC. Are these events connected? Is it possible I have a hidden virus, or is it just a coincidence? I'm having trouble talking to my friend about changing passwords. Can someone help me understand what might be happening? I'm not very tech-savvy.

Answers

TechieTom123
It's normal for the Command Prompt to flash briefly when starting your PC, but if it happens while you're playing a game, it could be concerning. I suggest running a full scan using Malwarebytes just to be safe. Also, regarding your Steam accounts, if you didn't have two-factor authentication (2FA), that's a vulnerability. If you guys were using Steamtools or other third-party apps before, they might have contributed to the breach. Just keep your guard up!

ConcernedGamer09: I did a full scan with Malwarebytes multiple times, and nothing showed up. I've heard of 2FA but I'm really not sure if we were using it. It's the one where you get codes from your email, right? I used to use Steamtools but deleted it. I'm worried because it feels overwhelming with all this advice.

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WindowsWizard
Sometimes after a Windows update, Command Windows can accidentally pop up. It's a bit of a sloppy programming quirk, but it doesn't necessarily mean something's wrong. Still, itโ€™s good youโ€™re being cautious about your security!
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GamerGuy321
It's possible you've got a Ryzen CPU? Some users reported that it causes the Command Prompt to open occasionally for a brief moment. Just a little quirk!

CuriousPineapple72: Yeah, I think I do have a Ryzen CPU. That could make sense.

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