How to handle alarming browser warnings that claim your computer is infected.
Short answer
Do not call the number or install software from the warning. Close the page or browser safely, run your normal security checks, and investigate further if the warning keeps returning.
A browser page can display a convincing warning without proving that your computer is infected.
Do not call a number shown in the warning, install software it recommends, or give someone remote access.
Close the browser or suspicious page and run your normal device security checks.
If you already gave remote access, payment information, or passwords, secure those accounts and contact the relevant provider.
Check it now
The core things that keep a phone or computer reasonably secure.
Open the checkSomething already happened?
If you downloaded or opened a suspicious file, stop interacting with it, run a security scan, update the device and watch for unusual behaviour. Get help if the device continues behaving strangely.
If you entered your password on a suspicious website, treat that password as compromised. Go directly to the real service, change it, turn on MFA, and check recent account activity.
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