Real virus warnings never give you a phone number to call
This is the giveaway. Microsoft, Apple, and your antivirus will never put a phone number on a security warning and tell you to call it. That number goes straight to a scammer, not a tech company. The moment you see a number to call, you are looking at a scam.
The scare and the rush are the entire trick
Everything about the pop-up is built to panic you: the alarm sound, the frozen screen, the claim that your bank logins are being stolen right now. That urgency is the scam. Real problems give you time to think, and an honest technician will never pressure you to act in the next sixty seconds.
Never let anyone you didn't call have remote access
Once you call, they ask to connect to your computer to fix it. That remote access is how they steal files, install real malware, and watch you log into your bank. If you did not place the call yourself, to a company you already trust, never let anyone take control of your screen.
What to actually do: close it, and if you can't, shut down
The pop-up is usually just a web page, alarming but harmless until you act on it. Close the browser tab or window. If the screen is locked up and won't close, hold the power button until the computer shuts off, then turn it back on. Do not call the number, and do not type in any passwords.
If you already called or gave access, act fast and don't panic
It happens to careful, smart people, so there is no shame in it. Disconnect from the internet, change your important passwords from a different device, and call your bank if you shared any financial details. Then have the computer checked to be sure nothing was left behind. The sooner you act, the less damage gets done.
Got a pop-up you're not sure about, or let someone in and now you're worried? Call or text me. I'll tell you straight whether you're fine, and clean it up properly if you're not.