There is a way to prevent this happening by only receiving critical updates via windows update and removing the following patches from your system, then hiding them in Windows Update.
Still on W7Pro 32 & 64 bit with no nags for GWX or the stealth upgrade.
Telemetry Patches to remove from system (so far):
KB2876229 SKYPE. (I dont use it)
KB3022345 Replaced by KB3068708 Telemetry
KB3022345 Caused false sfc result
Takes around 20 mins to do but, well worth it to have your personal computer back (correct as of 11/09/15)