Stuck on blue screen

[Taskmaster45013]

Last night we took laptop off power supply and the power ran out while using it. Today we plugged it back into power supply and it powered on to blue screen that says ‘working on features. 100% complete. Don’t turn off your computer ‘. It’s been this way for hours. We’ve done a hard reset. What else can we do ? 

[Echo_Lake]

@Taskmaster45013
Thank you for posting on the HP Support Community.

Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:

• Have you made any hardware/software changes?
• Did this happen after a recent window or software update?
• What is the product number of your device? Use this link to find it: http://support.hp.com/us-en/document/c03754824

While you respond to that, let's try these steps: 

Firstly, run Hard Reset: Follow steps from the link: https://hp.care/2GnkMa8 (if the computer doesn't start up/power on you can skip the next step )

Next step, BIOS default: 

1. Turn off the computer and wait five seconds.
2. Press the Power button to start the computer and repeatedly press the F10 key to enter the BIOS setup menu.
3. On the BIOS Setup screen, press F9 to select and load the BIOS Setup Default settings.
4. Press F10 to Save and Exit.
5. Use the arrow keys to select Yes, then press Enter when asked Exit Saving Changes?
6. Follow the prompts to restart your computer.

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.