How to disable IE9 add-on

How to disable IE9 add-on performance notifications, you Idiots

Within days of an almost painless deployment of Internet Explorer 9 across the site, I began to spot this annoying little git popping up on some of the older machines:

This is a new and well-intentioned feature of IE9 called the Add-on Performance Advisor. Yes, a lot of add-ons are bloated, steaming, piles of manure, which is precisely why I don’t permit my users to install them. Unfortunately, just having Java on many of my older machines is enough to trigger this, and if kids go around disabling that, the next thing that happens is I get a lot of calls from ICT lessons when all the sites they still use that rely on Java don’t work.

So, if you want your add-ons and do not want the stupid warning, here's the way:
1. Start Group Policy Editor (click Start and in the search/run box type gpedit.msc and hit return);
2. In the Policy Management Window that appears, navigate down to:Computer Configuration > Administrative Templates > Windows Components > Internet Explorerand locate Disable add-on performance notifications - double-click on it to open it
3. Select Enabled and click OK (check visually that it now says Enabled)
4. Close Group Policy Editor and restart IE9