I've been doing some digging around now that I have it happening on 3 computers which had clean installs of 1709. it appears when the start menu goes south the event log shows the windows shell experience is terminating due to a timeout. I tried a few things including a power shell command to re-install Cortana but no luck
I assume you mean client machines? Three of your own would be a crazy coincidence (unless of course you're ticking some setting that is causing it). I'm still on the same 1709 installation I posted about earlier and everything is tip top for me.
I should note that I completely (as much as possible) disable any and everything Cortana from the get go. I don't even let it "get to know me" or whatever. That may be part of your issue (using Cortana, I mean). Heh.
Yeah, client machines as in three desktops. It is odd because I turn all that nonsense off during the setup process. Basically, all I'm doing is installing drivers, doing all the Win 10 updates, tossing chrome on, and slapping Sophos Home anti virus on. Then just through general use like 30 minutes of web browsing is when I've been noticing the failures
Intel i7-7700, MSI Trident, 32GB DDR4 2133mhz, Geforce 1060GTX, and Samsung Evo 1TB.