My desktop turns on, then after about 15 seconds shuts itself down.

[PJSchno]

Desktop starts, runs 15 seconds, then shuts itself down. One time it gave  a message tha battery was low and plug it in. There is no battery, this is a desktop. System seems to think it is a laptop. It is plugged in to the wall outlet.

[Echo_Lake · Accepted solution]

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

• Did this happen after a recent window or software update?
• Have you made any hardware/software changes?
• Have you tried any troubleshooting steps?

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

[PJSchno]

Thanks for the assistance. It's been fine now for 15 minutes so I believe it is fixed.

[Echo_Lake]

@PJSchno

Glad to hear that the issue is resolved. If you need any help, feel free to reach out to us.

Have a great day!