Windows 10 Update 10586 (Windows Sucks)
This upgrade, in combination with Kaspersky Anti-Virus and a Powershell command that fixed a problem with the Windows Store before the fall update but trashes it beyond repair after, has reduced my Surface Pro to basically a Chromebook. Unable to perform a factory reset. I've uninstalled every patch I can and performed multiple clean boots along the way. My Surface is f***ed. My only hope is that Microsoft Store can fix it. The nearest one is 4 hours away. As soon as it's working again I'm selling it and buying a MacBook.