There's a whole 'nuther thread with a number of issues and fixes. Using the fixes I posted, I haven't had the issue where it was solely on the 910. In other words, if I see the "no internet" triangle now, it's also on all the other devices in the house which means the router gets a reboot.
First thing to do: Use Control Panel to search for and - if it's there - remove the Qualcomm WLAN Installer program. Not the driver.. the installer program.
Next, download and install Lenovo Vantage from the Windows Store. Use it to update all your drivers that need it.
If Vantage doesn't detect an older BIOS (or you already have the latest), use the support download page to download and update that.
Finally, make sure your router is using the latest firmware available to it.
Those steps, alone, have solved the issue for a number of people. I'd stop here and run it a while to see if it fixes yours. If not, read on.
I also assigned different SSIDs to the 2.4 and 5Ghz bands in my router so I could force the 910 to only log on to the 5Ghz radio. Seems the least little blink in the 5Ghz band and it'd fall back to 2.4 where all my neighbors are. That's when I'd get the triangle. Latest drivers combined with forcing it to stick to 5Ghz solved most of the issues. It would still happen, though not terribly often and it'd happen on both my 910 and my iPhone at the same time.
Lastly, I discovered a truckload of WLAN and DCOM errors in the Event Viewer. Probably caused when the WLAN installer program got stuck after a Windows Update. I was able to solve all but two of those errors (which don't appear to impact anything).
About three weeks ago, I got a different router. It has two 5Ghz radios in it. So, phones go on one, laptops on the other. And the handful of 2.4 devices I have go there. Only one triangle in three weeks and it affected every device in the house. Rebooting the router solved it.
I can't point to exactly which fix solved the issue since I applied all of them at roughly the same time. But, for me, it all works, now.
FWIW, I had none of these issues prior to Windows' "Anniversary Update."