Hi ace552,
>>Why is silver light not showing up in add ons but it is installed. IE ver 11 windows ver 10
When we installed SilverLight, we can see all add-ons through the following way.
IE -> Tools -> Manage Add-ons, you will see the following screenshot.

You said you didn't see the silverlight showing up in add ons. I suggest you can try methods to check whether your Silverlight is installed currently.
1: Open a Silverlight Demo page to verify that there is no problem with your Silverlight installation
The Silverlight Demo page URL:
https://www.microsoft.com/silverlight/new-controls/demo/
2: If your Silverlight is not installed properly, try to clean a corrupted Silverlight installation and then reinstall Silverlight (Download the latest Silverlight plugin and Restart the computer).
How to clean a corrupted Silverlight installation and then reinstall Silverlight:
https://support.microsoft.com/en-us/kb/2608523
Best Regards,
Yohann Lu
MSDN Community Support
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