Old thread I know. I'm getting a Win 10 machine and have a Win 7 machine with Sonar 8.5.3 and a lot of VSTs.
Scanning them in the new install will allow those (freeware) that are just .dll files work fine. My issue is more than half probably need to d a full installation, as installing them isn't just about putting a .dll in your VST folder but putting a few other things in System 32 and / or the Registry.
I learned years ago here (and did it on a prior similar new PC scenario) you can drag the .dll in File Manager over to touch something found in System 32. I just can't remember what. It worked 90% of the time, saving a lot of time in not having to authorize as much stuff. Help anyone?