I deleted MS Silverlight altogether I use Netflix HTML5 on the PC's .In any event Google Chrome does not support 1080p Netflix at all ,it's limited to 720p like FireFox no matter if you use HTML5 or Silverlight which I'm not even sure Netflix is recommending anymore anyway .
*** If you want 1080p Netflix in a Windows PC browser it's only in IE 11 in Windows 8.1 x64 and Windows 10 x64 or Microsoft Edge in Windows 10 x64 or the Windows 10 x64 Netflix runtime app encodes and Safari up to 1080p on Mac OS X 10.10.3 or later
HTLM 5 Supported Browsers:
Google Chrome version 37 or later on Windows XP Service Pack 2 or later and Mac OS X 10.6 or later (Snow Leopard)
Internet Explorer 11 or later on Windows 8.1 or later
Microsoft Edge on Windows 10
Mozilla Firefox version 42 or later on Windows Vista or later
Supported on stable, official release builds from Mozilla. Non-Mozilla builds are not supported.
Opera version 33 or later on Windows Vista Service Pack 2 or later and Mac OS X 10.9 or later
Safari on Mac OS X 10.10 or later (Yosemite)
Supported on all 2012 or later models and select 2011 models
Resolution: Stream in HD if your Internet connection supports 5 megabits per second or more.
Google Chrome up to 720p
Internet Explorer up to 1080p
Microsoft Edge up to 1080p
Mozilla Firefox up to 720p
Opera up to 720p
Safari up to 1080p on Mac OS X 10.10.3 or later