Reinstall Avast after changing from Windows 7 to Windows 10

I have installed Avast Internet Security on my Windows 7 machine but intend to do a fresh install of Windows 10 soon. Can I reinstall Avast on the Windows 10 system using all the same software credentials? Are there any other concerns I should consider?

Yes you can use your existing license on the new windows 10 installation.

You should be able to assign the licence from your my.avast.com account, you may need to delete the old device, before assigning it to the new installation.