Does each avg file download have a different license number? If not, Tell me the number?

Yes… each one has a different number that is tied to the Microsoft Windows COA license number. I had a machine that had AVG installed and working fine but the Windows software was not valid (a pirated copy) and when I updated the COA to a valid one, AVG wouldn't work anymore saying the licensing number had changed!!! I had to uninstall it and reinstall to get it to work… so, yeah… different for each machine.