Reinstalling Tuneup on a new computer

Barbara, Have a look @ this article (https://support.avg.com/SupportArticleView?q=activate+pc+tuneup&urlname=How-to-activate-AVG-PC-TuneUp&l=en_US).
AVG Guru

When I type the product key; after the first 4 letters I get a response that it is not formated correctly.  I have a backup disc but when I attempt to install I get a message a newer version is installed.  There are NO AVG programs in my "All Programs"  directory.
I just can not think of another  option.  HELP!

Barbara, Have a look @ this article (https://support.avg.com/SupportArticleView?q=activate+pc+tuneup&urlname=How-to-activate-AVG-PC-TuneUp&l=en_US).
AVG Guru