Could this be a hack

I have just turned my laptop on and find that AVG Secure Browser has installed and seems to have taken over my internet. I have not downloaded this and wondered if it could be an add on that has been added. I do pay for AVG security etc.Anyone help on this please  I have de activated it at the moment.

Hello Colin.
Sorry for any inconvenience caused. We'll be glad to clarify this.
AVG Secure Browser is a web browser, with built-in security and privacy features designed by AVG to keep you safe online. The distinctive Security & Privacy Center includes a collection of tools and features that enable you to manage your online privacy, identity, and personal data. Secure Browser is offered when you install the latest version of AVG Antivirus.

It is usually bundled with the installation of AVG AntiVirus free or AVG Internet Security. You will have an option to opt out the installation of this browser on the welcome page of installation setup.
The browser will get installed if you did not opt out.

If you would like to uninstall AVG Secure Browser, click this link for instructions.