Other than doing a complete re-install of Win7, I don't think there is a fix for this problem - even the re-install might not help!
I have the same problem, I gave up after many attempts at different 'fixes'. I turned off auto-updates. So far, no adverse effects and I have been running Win7 on my new laptop for about ten months now.
I would update to Win8, but positively dislike Win8.