A few days ago when opening Ethereum Wallet version 0.8.9 I received popup windows notifying me to update the Wallet to 0.8.10 and Geth to 1.6.6. Here is a screenshot of the latter:
This notice directs me to windows.net, but it appears github is the official repository and that the latest version is 1.6.7, not 1.6.6. Additionally, I am no longer receiving this notice, Ethereum Wallet > 'Check for Ethereum node updates...' has no effect, and Ethereum Wallet > 'Check for updates...' opens a window (after a brief waiting-animation) reporting, "No update found. You are running the latest version of Ethereum Wallet." However, I'm still using 0.8.9 according to Ethereum Wallet > 'About Ethereum Wallet'.
Is it simply not showing updates at the moment due to limitations (or blocked ports?) of the public business's hotspot that I am now checking at? (The notice appeared using a different non-public Internet connection.) Is windows.net an official download mirror for the Ethereum community?