Here is wemod screenshot
and this is my steam library
As you can see, the first example is .hack//G.U. Last Recode not detected by Wemod and then almost everything on my steam library not detected by Wemod.
Are the games legitimately purchased from their stores or cracked/pirated versions?
All my games are legitimately purchased on Steam, GOG or Origin
Are your games saved in the default C:\ or somewhere else (ie, another drive, external storage).
Some are on C:, other in steam library folder created on internal drive partition and external drive. Wemod was able to detect all my games on both internal and external drive.
Just in case - make sure WeMod, Steam and GOG Galaxy are whitelisted in your antivirus. Then check the quarantine (or virus chest) menu of your antivirus to make sure nothing from these three softwares are quarantined there (if there are, de-quarantine and whitelist it).
Wemod is already excluded on my antivirus as I told on my post that I followed the previous solution.
Make sure Steam and GOG Galaxy aren’t pending an update to be compatible with the new Windows version you installed.
The issue persist even when there is no pending update for them