AVG antivirus is as simple as using, simply downloading it from their ACG website, installing and running it, entering your email and password. For Anti virus guard, it really works as a guard.

If you have already successfully upgraded to Windows 10
And now I can't install AVG

• First of all, you must uninstall the existing copy of AVG.
•  Follow the instructions for Windows 10 to uninstall AVG:
• In the system search field, type Control Panel and select Control Panel from the list.Go to Programs > Programs and Features.
• Right-click AVG in the program list and select Uninstall to open the AVG uninstall wizard.
  Note: In case you have other versions of AVG installed on your PC (e.g. AVG Protection, AVG PC TuneUP), uninstall them first.Follow the instructions on your screen to complete the uninstallation.Restart your PC
• And then install a copy of AVG compatible with Windows 10