Hello everyone,
As you know, we have released a micro Update patching avast9 and avast10 (aka avast 2015) installations. For these versions we believe the problem should be gone now, and you are safe to install KB3000850.
We are also working on a fix for older versions, however since we have implemented the micro updating mechanism only in avast version 9 and 10, we couldn't use the same pathes. For avast8 there is also an option how to deliver the update (emergency Update), but that requires more work and testing.
As far as I know, the update is already ready and is now in the QA labs for testings. As soon as it'll be verified, which should be soon, hopefully today, it'll also be released for both Avast8 Consumer and Avast8 Business editions.
Sorry for this, I know this has caused a lot of troubles for many of you. Even though we do test windows updates regulary and automatically, this scenario - shutting down the PC and restarting was not sufficiently covered.
Lukas.