4 optional updates

Saw 4 optional updates today, probably came in Tuesday, though. Mostly obscure bug fixes. https://support.microsoft.com/en-us/kb/3139923 https://support.microsoft.com/en-us/kb/3138901 https://support.microsoft.com/en-us/kb/3137061 https://support.microsoft.com/en-us/kb/3133977