Don't worry. Microsoft made this much easier by taking away the ability to pick and choose the updates you can install. Not only are updates now mandatory and WILL be installed, all updates to Windows are now rolled up together as one cumulative update. So while you can disable network access and other router tricks to stop windows update from installing updates, updates are STILL an all-or-nothing approach as starting as of this most recent rounds of updates, all updates are issued as roll ups that include all updates from the most recent round of updates and ALL previous updates that were issued.
Now if one of their minor updates is breaking the connection to your kindle, your only choice is to remove ALL updates that were installed the last time and not install any new updates until Microsoft fixes their shit.