The tech support scammers have come up with a new method. They may have been able to find out your computer ISP and you find that a popup appears on your screen looking a bit like this though varies depending on your internet provider.
It does show your ISP number. People who think this is real ring the phone number shown (the number shown above is for a US computer user, but this would be different on a UK computer). It's not the real IP support number, but the scammers and then they go into their normal way of trying to get access to your computer.
And it's you paying for the phone call rather than the scammers.