Sounds like you may have had a bad update, one that didn't install correctly, which put the system into a loop. Is a lovely problem that occurs in 10.
Try this..
1. Turn off the laptop. Off not sleep or hibernate.
2. Either turn off your WiFi or turn off the router/modem. Or, should that not be possible where you are, then take the laptop somewhere that there is no WiFi access. (If connected via Ethernet, just unplug it.)
3. Once the computer has no possible way to access the internet, turn it on. It should go through and load all the way through to Windows. Once it has done this, then you can connect it back to the internet again. (WiFi or Ethernet)
Should that not help, try the following...
Note: Again, make sure the computer has no internet access before doing this.
1. Power off the laptop.
2. Power on the laptop.
3. As soon as you see the rotating loading circle, press and hold the Power Button until the computer shuts off.
4. Repeat this process a few times until you see the "Preparing Automatic Repair" screen.
5. Now you want to let the laptop boot to the "Automatic Repair" screen.
6. Click "Advanced Options" and then select "Troubleshoot".
7. Here you want to select "Refresh your PC", if you do not wish to erase data, or "Reset your PC" to erase all data and restore your system.
8. From here just follow the screen instructions until the recovery is completed.
NOTE: You will need to get into the "Advanced Options" in order to get the "Refresh Option". This choice will keep your data, but any programs installed will be lost.
Do not do a "Reset" as that will wipe all data you have on the laptop.
Another version of this is the following...
1. Power off the laptop.
2. Power on the laptop.
3. When screen turns black, hit F10 and ALT repeatedly until the computer shuts off.
4. You shouTo fix the computer you should choose the second option listed.
5. When the next screen loads, choose the option "Reset Device".
6. Now choose which ever type of reset you wish.
7. Your coputer should now restore itself to "Factory Settings".
NOTE: If you get a message saying "Error Resetting Device", then you should have the computer looked at by the manufacturer (if still under warranty) or by a tech.