Changed hard disk

Dhiraj, Please note that with Win 10 Windows Defender was re-classified into an AntiVirus product which can conflict with AVG.
AVG Guru

I paid for AVG subscription. Because my hard disk was giving problems, I had new hard disk installed with Windows 10, which comes with a defender.  How can I have my old AVG subscription continue?

Dhiraj, Please note that with Win 10 Windows Defender was re-classified into an AntiVirus product which can conflict with AVG.
AVG Guru