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Internet Explorer 11 repeatedly tells me I need to install Silverlight. However, I have already installed (and uninstalled and reinstalled) Silverlight several times with no success. I have even tried uninstalling with an advanced tool (Revo Uninstaller Pro). I am using Internet Explorer 11 x64 on Windows 7.

Silverlight works fine on the same system in Chrome and Firefox--just not in IE 11. I am a software developer, and so I have Silverlight SDKs, though it seems to me that should make no difference.

So why does Internet Explorer not recognize the Silverlight installation?

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One possible problem is the fact your using IEx64. Does this problem happen if you use IEx86 which chrome and Firefox both are. – Ramhound Jan 24 '14 at 17:06
@Ramhound--I had tried opening IE 32-bit version, too, but had the same problem. – Peter Rankin Jan 24 '14 at 17:29
up vote 1 down vote accepted

I had to enable the Silverlight add-on in IE (thanks to a post here):

  1. Click "tool" icon in upper-left of IE
  2. Manage add-ons
  3. Show "All add-ons" (left pane)
  4. "Microsoft Corporation" category
  5. Select "Microsoft Silverlight"
  6. Click "Enable"
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