Hi. when I tried to log on to Virgin Media email I got an error code 035-107-067 and a message (claiming to be from Virgin Media) that my system appeared to have been hacked by Cydoor Spyware. It was recommended that I telephone 0-800-046-5706 whish was the contact number for Supremo. Is this company recommended by Virgin and the Community for correcting security faults?
It's highly likely to be just a popup which, as before, you can ignore quite safely... rather than the machine being compromised. If you're still concerned, scan it with MalwareBytes (or similar) or speak to a professional.