Re: Advance info about killer updates?
Usually updates create a restore point, and if the machine can't boot you can get back to it. If you often end up in troubles like that (but did you identify the root cause? Was it an update flaw, or your configuratin has issues, i.e. a badly written driver?), you should update first a test system and validate updates for your site. Or if you don't have a test syste, wait a few days to install updates - maybe just some of them, for example those patching the kernel - and check if anybody signal troubles for them, knowing your machine(s) could be at risk until fully patched.
Issues should be reported to Microsoft, you can find info on several sites, but the official source is MS support site.