Find the DLL used by an Internet Explorer Add-on

Found this by accident, but it’s surprisingly easy. I’m using the latest IE, version 11.

Click the IE settings cog, and then click Manage add-ons from the menu.
IE11 settings menu manage add-ons

In the Manage Add-ons dialogue box, highlight the add-on you want to find the information for, in this case, the HP Network Check Helper.
IE11 manage add-ons dialogue

Click the More information link, to the bottom left. The More information box shows you the filename and containing folder of the file that “is” that add-on.IE11 add-on more information box

If you want to uninstall the add-on, sometimes it is as simple as running

regsvr32 /u <full path to dll>

(although that doesn’t actually work for the DLL example I’ve chosen in the examples above!)

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