Common Files folder in Windows

Does Steinberg use any of the Plugins stuff in Common Files folders or, is that for Pro Tools.
I’ve always thought Steinberg stuff is in the VST and VST 3 folders.
Can i delete Plugins that are in the Common Files folders ?

on my system the common files folder contains the vst3 folder, a Steinberg folder and some other folders which are for sure used by cubase. I don’t think it’s good idea to delete that stuff. The AVID Folder inside the commons folder is for Pro Tools and can be deleted however.

OK Thanks for the info’ jazztom.