It sounds like you installed all our plugins, instead of just the ones you own. Unfortunately, ProTools starts up our authorizer as soon as you launch it, instead of waiting for you to actually use the plugin on a track, like other DAW's do. If you want to do a 14 day free trial for our plugins, just click "I'm online" and go through the activation process, and the prompt will stop coming up.
But if you just click "Quit" on that authorization window, the activation prompt will keep coming up for every plugin that's installed. So you don't want to try our plugins, I'd recommend that you uninstall them before you run PT again.
To do this on Windows, you can find them in one of these two locations, depending on which version of ProTools you're using:
C:\Program Files\Common Files\Avid\Audio\Plug-Ins
C:\Program Files\Common Files\Digidesign\DAE\Plug-Ins
To do this on Mac, just go to the Finder, click on the "Go" menu, then click on "Go to folder..." and enter this file path:/Library/Application Support/Avid/Audio/Plug-Ins
Or enter this file path if you're using an older version of ProTools:/Library/Application Support/Digidesign/Plug-Ins
Then, look for the plugin names in these folders and throw the files in the trash.