There are different ways of doing recovery.

Please remember if you do a recovery everything on the computer will be wiped out and it will become a brand new computer.

Method 1

Press and hold the Power key for 5 seconds to power the system off completely.

Press the Power key to turn on the computer.

Press the Alt and F10 keys at the same time when the Acer logo appears on the screen. ...

Select Troubleshoot.

Click Reset your PC. This process will erase all data on the your system.   You will see "keep my files" and  "Remove everything"

Choose the Refresh your PC option or "keep my files" if you want to restore your system and retain your data.  There will be an application loss if you chose "keep my files" option.

chose " remove everything " and click on "Just remove my files"

Click Reset to begin the recovery.

If the "just remove my files" option is not working you can try "fully clean the drive"

Method 2

If you are able to boot the windows

click on start, settings, update and recovery, recovery, reset this pc

It will show you "keep my files " and "remove everything" to continue with the recovery process

Method 3

You can start the recovery process using the recovery media which is designed for your computer.

It might be a set of cds or recovery flash drive which you can get it from Acer store.

Method 4

You can download the windows 10 to a blank usb flash drive using a different computer.    After downloading the windows 10 to the flash drive you can connect the flash drive to non working computer and start the recovery process.

If you are not trying to do recovery and if you have just lost the recovery option after the updates...

1. Try to do a system restore  ( By going to advanced options ) 

It will restore your computer to an earlier date on which it was working fine. 

2. On the troubleshoot menu, go to advance option,  you will see an option to uninstall update

How to reach troubleshoot, advanced options.

Start the computer, on the login screen don't type the password.

Hold the shift key ,  click on restart ( which you will see when you click on the power button on the screen )

You will see, please wait and then it will go to troubleshoot and advanced options

Step 2

Turn off the computer.   While holding the alt key turn on the computer and tap f10.  It will go to Troubleshoot, continue and advanced options.

Step 3

If none of the steps are working.  

Please click on troubleshoot, click on reset this pc - click on keep my files and try to refresh the pc.   There will only be an application loss if you do this.

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