Laptop won't start if it's not plugged in first

Hi,

First with the laptop on and working create a Win10 battery report to check the status of the battery to eliminate it as the problem just in case it is coincidental that this occurred after an update. Check the design capacity versus the full charge capacity information.

If the battery appears to be OK then try to get into the WRE (Windows Recovery Environment) menu area.

To do this, turn off the laptop and then start it again. Once it starts allow it to start to boot into Windows and then force stop the laptop by holding the power button until it shuts down.

Do this procedure 3 times, i.e. start > boot > shutdown, start > boot > shutdown etc. On the 3rd attempt it should boot into the WRE.

Once there select Troubleshoot > Advanced > Start up Repair and follow the prompts.

Do not select Reset your PC because if you select the wrong option after this you could erase all your data and reinstall Windows.

If this doesn't work use the same procedure and try to restore your laptop using a system restore point or a system image (if you have them that is)

If you can’t get into the WRE for whatever reason on your laptop, you can create a Windows 10 Recovery USB from any known working Win 10 computer. You'll need an empty 8GB flashdrive and about 60 minutes of time to do this. In the host computer go to Control Panel > Recovery > create a recovery drive and follow the prompts.

When you have created the USB drive, plug it into the laptop start the laptop and then alter the boot options in the laptop (press Esc, then F9 on startup) to boot from the USB first. It will load the WRE and you can try the startup repair as mentioned before. If it won’t boot from the USB then go into BIOS and enable the Legacy USB (or CSM) setting, save the changes and restart the laptop.

Please verify the model number of the laptop?