I have had exactly that problem on TWO quite different machines, one HP Envy i7 Laptop and one Asus i3 Laptop, one with Chrome and Webroot AV the other with Firefox and MS AV. Both with Win10-64 OEM basic.
After the big springupdate, both had trouble of "awakening" after going into sleepmode (closing the lid without power off) som thing that NEVER was a trouble before spring update.
Then my Envy decided to update the spring update, said it was updating and not to turn off the machine, then rebooted by itself and got stuck with the spinning circle. First the HP logo then logo with spinner and then spinner without logo.
After spinning for an hour, i turned it off. Thought it might be a crash caused by a virus (is win10-spring a virus then?) or a combo of all my applications. Mind You that I had plenty of problems with Win10 fall update too, however only compatability problems
with applications, NOT any locks.
Ended with that I did a reistallation of the OS. Took me a day so far, and lost all my applications, some of which I am not allowed to reinstall. Who is going to pay for that??!
Why is it that MS uses their customers as unwilling beta-testers and has absolutly no strategy of helping them out of a situation their incompetence put their customers into.
I suggest we for a group and get a law firm........