Hi spitfire
Sometimes Anti-Virus can be a real pain, probably does not like the .exe application?
Uninstall your Game Launcher from the Control Panel's Program and Features.
Run a free registry cleaner like Ccleaner, in my tutorials if you need it, re-boot your system and install this genuine game launcher on any drive and you can use any folder.
Post #97 SH5 Game Launcher Install It Anywhere On Any Drive
Post #74 Run Both SH5.exe And Ubisoft Game Launcher Application's As Administrator's
You can set your anti-virus to make an exception in advanced settings for Ubisoft SH5.exe and the Game Launcher 32 bit exe (1st icon application is 32 bit)
Peter