Usually, add-ons are version dependent and so, they work in that particular version only for which they are designed for. Therefore, if Internet Explorer is updated, kindly check that the suitably compatible gadgets are available from the gadgets' website.
Have you tried to reset DPI to 100% Smaller Fonts, then test this issue again?
I found a similar thread, please refer to:
Gadgets not working with IE-11 Win7 Pro SP-1 (NOT Win8.1 Preview)
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after upgrading to Internet Explorer 11 yesterday, I had the same problem. My Clock gadget would not even appear on my desktop. I am using the 125% Medium Display size Windows option. The Clock was invisible. After making several drag and drop attempts with the Clock, my Windows 7-64 started to stutter. I had to right-click and Uninstall the Clock. After rebooting, I restored it in my Gadgets list. I upgraded my nVidia display drivers to 341.44 but that did not fix the problem.
I found the solution here: Gadgets not working with IE11 Win7 Pro SP1 written by blogthis. The problem is, after upgrading to IE11, the Clock does not AutoScale to the 125% or larger Display sizes. You must remove the AutoScale option for the Clock. To fix the problem you must edit the Clock's gadget.xml file which is a Windows protected file. To edit the Clock's gadget.xml file requires several intricate steps. If you are a novice user, I recommend you do not attempt to fix it. Just buy a small clock such as this one: Foldable Desktop Tabletop Calendar Temperature Digital Alarm Clock. See my review here.
Even if you are successful in editing the Clock's gadget.xml file, if you do not correctly restore this file's protected features, you leave yourself open to virus and hacker attacks. This is why I recommend that novices to not attempt this procedure.
I did complete the procedure and I am pretty sure I correctly restored the file's protected status. My Clock gadget now works correctly. However, the clock is 25% smaller than my Calendar gadget. As I mentioned before, after upgrading to IE11, the Clock will not AutoScale correctly. It's pathetic that Microsoft, one of the richest companies in the world, couldn't release a patch for us. Haven't we made Microsoft rich? Haven't we loyal customers made many Microsoft employees millionaires and they couldn't fix this for us?
If you are an advanced user, use the Calender's gadget.xml file as a template to ensure you have correctly restored the Clock's gadget.xml's protections. You do not want to leave a security hole in your system. Do not alter the Calender's gadget.xml file in any way.