A customer in contacted me today saying his was very and behaving strangely after a large update had gone through. He said it took quite a long time for the update to complete and when it rebooted he wasn’t able to log in as per normal.
I found that his has got stuck in a type of hibernation loop where it had gone to sleep after the update (possibly due to low battery) and wasn’t waking up properly to allow him to log in. I pulled out the battery from his laptop for 1 minute and then tried to boot up again with the battery in and was able to trigger the repair menu. After a few more steps repairing his Windows startup and getting the update in question to successfully complete this time – he was back up and running.

 
Mark JANSEN 
280 6 - Hallett Cove Onsite Computer Support : Slow laptop after Windows 10 update
DIGITAL INSITE 
Adelaide Computers + Support 
Mobile : 0404 110 526 
Office : (08) 8387 9023