Those repeating McAfee “virus” pop‑ups are almost always fake alerts from a website or an adware program, not a real McAfee app or a real infection. Use these steps to stop them and then check for malware.
- Close the fake warning safely
- If the screen is taken over and you can’t close it normally:
- Press Alt + F4 to close the current window, or
- Press Ctrl + Shift + Esc to open Task Manager, select your browser (Edge/Chrome), and choose End task.
- If nothing responds, hold the power button until the PC turns off, then turn it back on.
- Remove fake notification sites in your browser These pop-ups usually come from sites you accidentally allowed to send notifications.
In Microsoft Edge (Windows 10):
- Open Edge.
- Select the three dots (…) in the top‑right > Settings.
- Go to Cookies and site permissions > Notifications.
- Look under Allow for strange or unknown sites (often not mcafee.com but random names or scam domains).
- For each suspicious site, click the three dots next to it and choose Block or Remove.
If using Google Chrome:
- Open Chrome > Settings.
- Go to Privacy and security > Site settings > Notifications.
- Under Allowed to send notifications, remove any suspicious sites.
- Uninstall any unwanted “security” or adware apps Sometimes a program was installed that keeps causing pop‑ups.
- Press Windows key + I to open Settings.
- Go to Apps > Apps & features (or Installed apps).
- Carefully scroll the list and uninstall anything you don’t recognize or that you know you don’t want (for example, unknown “security”, “cleaner”, or “optimizer” tools).
- Restart the PC after uninstalling.
If a program doesn’t uninstall cleanly, the guidance is to contact that software’s support for a proper removal tool.
- Run a full malware scan with Windows Security Windows 10 already includes built‑in antivirus.
- Select Start > Settings > Update & Security > Windows Security.
- Choose Virus & threat protection.
- Select Scan options.
- Choose Full scan and then Scan now.
- Let it finish and follow any actions it recommends (Remove/Quarantine).
If the same threat keeps coming back or Windows says it was only partially removed:
- Run the Malicious Software Removal Tool:
- Press Windows key + R.
- Type
%windir%\system32\mrt.exeand press Enter. - Allow it to run, then follow the prompts to scan and clean the PC.
- If problems continue, run Microsoft Defender Offline:
- Go to Windows Security > Virus & threat protection.
- Select Scan options.
- Choose Windows Defender Offline scan > Scan now (the PC will restart and scan before Windows loads).
- Turn on protection features
- Make sure Tamper Protection is turned on in Windows Security so malware cannot easily turn off your protection.
- Keep Windows Update turned on so you get the latest security fixes.
- General safety tips to avoid these pop‑ups again
- Do not call any phone number shown in a pop‑up claiming to be from Microsoft, McAfee, or other companies.
- Do not click “Allow notifications” on random websites.
- Avoid sites offering illegal downloads or pirated content; they often host malicious ads.
If, after doing this, the pop‑ups still appear, repeat step 2 (notifications) and step 3 (uninstall apps), then run another Full scan and, if needed, Microsoft Defender Offline.
References:
- Troubleshoot problems with detecting and removing malware
- Protect my PC from viruses
- Antivirus and antimalware software: FAQ
- Microsoft resources and guidance for removal of malware and viruses
- Unexplained Windows or software behavior may be caused by deceptive software
- When you open a file on a Windows based computer, the file may start a different program
- Endpoint Protection client frequently asked questions
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