Hi Graham, we are sorry to know that. I can see that you have purchased AVG Internet Security. Please click on the below link and run the downloaded file ( http://www.avg.com/download-file-dm-isc ). Then, click on "Repair" option when prompted. Your AVG will be repaired and you will be able to use it as usual. Please do not hesitate to get back to us for further assistance. Thank you.
Graham, Win 10… Have you updated your AVG to the latest issue?.. Have a look @ this article (http://avgclick.me/W10compatibility).
AVG Guru
Since installing windows 10 (much to my regret) it has stopped AVG running at startup. Which is the executable that starts the main program?