Hi, Dear Lady, your reply is almost what I thought it would be. The big problem for me, the reason for my query in the first place, is that when I came to France my computer arrived ok, but the boxes with all my discs, both my computer cd's and my music cd's, for some strange reason got lost. That leaves my unable to re-install Windows, Malwarebytes, Eset, and loads of other programs. Never mind, that's life. Thanks for your help, enjoy the festive season. Bill
What? Me never mind? You been talkin' to my late Mama (she always said I would never mind her)?
Roland gave you excellent advice about keeping a record of all your license keys. I pretty much do the same thing.
All seriousness aside, read
this tutorial for various ways you can recover product keys for your programs.
Once you have your product keys, you can usually download the installation files for the latest versions of your programs, including Windows. Just plug in the program name in your favorite search engine (I refuse to plug Google; it's not the only search engine around) to find a download site for the program.
I'm practically OCD when it comes to backing up data, something you really should look into if you aren't already doing so (that would be a topic for another thread). One thing I always do when I download a program, an updates to an existing program, is to save the installation file into a folder. That way, if I ever need to reinstall a program or revert to an earlier version of a program (the latest versions aren't always the greatest), I can easily do so since I will have the appropriate file on hand. When saving an installation file, to make sure an overzealous Antivirus or Antimalware program doesn't zap it, I "sandbox" it in a zipped folder (I like
7-Zip for that) to protect the file. I can always unzip it when I need to use it.
I also backup my program installation CDs/DVDs by making an .iso file from each one. I use
CDBurnerXP for that (don't let the name fool you; it works well in Windows XP through Win 10, including Win 7). It's not the most intuitive program to use but it does have a help screen on the internet you can access from the program plus one of us can walk you through the process (again, a topic for another thread). Once I've made the .ISO files of my program discs, I keep them in my safe deposit box at my credit union (I'm not only OCD, I'm paranoid

) since I can use a virtual optical drive (generic name for CD and DVD drives) to open the .ISO files. I like
Virtual CloneDrive for that. It shows up in My Computer like a regular optical drive and you use it by right clicking on a .ISO file you to open up and click on Mount with Virtual Clone Drive. If the only .ISO files you use are for program installation discs, you can just make Virtual CloneDrive your default program for .ISO files (I also have .ISO files of my movies so I can't do that).
I'm already enjoying the festive season so you do the same! I already had a wonderful Thanksgiving dinner, well seasoned with good friends. Christmas should be the same.