BSOD :: Laptop Won't Start After Update

My HP Spectre 13 laptop won't complete a startup. It has the update of Windows 10 pro (from 8.1), a solid state drive (SSD), and classic shell. The computer started earlier today and I got a message that I could restart it to effect updates -- so I did. That restart seemed OK. Next I got a notice to upgrade my Kaspersky Internet Security (to KIS2016, I think) so I said OK. Then I got a message that I could restart to make the Kaspersky the effect. I did, and that is when I got messages in the following sequence.

(At some point a message flashed, too briefly to read, about a thread missing or something.)

1) "Your PC ran into a problem and needs to restart. We'll restart for you."
---- Messages: "preparing automatic repair" "diagnosing your PC"

2) "Your PC did not start correctly" [restart] [advanced options]

3) at [advanced options] offered this menu:
--(1) Continue - exit and continue to windows 10
--(2) Use a device -- Use a USB drive, network connection, or windows recovery DVD.
--(3) Troubleshoot -- reset your PC or see advanced options.
--(4) Turn off your PC

4) [Troubleshoot] offers:
--(1) Reset this PC - Lets you choose to keep or remove files, and then re-installs windows.
--(2) Advanced Options

5) [Advanced options] offers:
--(1) System restore -- use a restore point
--(2) System image recovery
--(3) Startup repair - fix problems that keep windows from loading.
--(4) Command prompt
--(5) Startup settings - change windows startup behavior.
--(6) See more recovery options - go back to the previous build.

So far I have only accessed the command prompt and listed folders with DIR. I am thinking of trying to use a system restore point, but I am worried about creating even more problems.

I suspect the problem is due to Win 10 or to drivers or to Kaspersky or an interaction between them. I will post this to Windows 10 forum, to HP Support, and to Kaspersky Support.