A Little Computer Warning

26/08/2026
A fake Windows Defender Security Center warning window showing blocked access due to DOS attack spyware, with Deny and Allow buttons.

If your computer suddenly starts playing a siren or you see a pop-up like this one, don't worry. I've been hearing about these quite a bit around Steyning lately.

Quite often, it's simply a scam pop-up rather than a genuine warning from your computer.

You can safely close the webpage and then run a quick scan for viruses with your usual antivirus software, just to make sure everything is OK.

Some of these pop-ups can be caused by website notifications that have been allowed in your browser. If you're getting them, this guide from Which? explains what to do:

Which? guide: How to stop scam pop-ups on Windows

And if you're still a little unsure, I'm always happy to take a look. 😊

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