This article from Lifewire explains what Tech Support scams are typically about, and also what you should do if you get caught out.

You can read it in full by clicking on the image above, or by pasting https://www.lifewire.com/your-pc-is-infected-phone-scam-153105 into your browser.

And please do let me know in the Comments if you found the information useful.

As always, stay savvy!
Kerri