I’m running Blender 2.90 in a Windows 10 Pro environment on an AMD Ryzen system with 32GB ram and an RTX2080Ti video card. When I attempt to install a plugin, the system console almost immediately confirms that the addon has been added. And yet, in a lot of cases, I can wait several minutes to see the activation checkbox, but the addon did install. In other cases, the system console almost immediately confirms that the addon has been added, but I never see the activation checkbox even after waiting several minutes and the addon does not appear in Blender. I am a retired IT support tech and keep all my drivers up to date. Most of the addons in question have been installed and removed several times in the past. Any ideas?