Hey Mohammad hasan Javid, sorry to hear your HP mini is giving you this headache—auto-powering back on right after you shut it down or put it to sleep is such a frustrating quirk. Let’s go through the most reliable fixes that usually resolve this issue:

• Check BIOS/UEFI settings (this is the most common culprit for HP minis):
  Reboot your computer, and as soon as you see the HP logo, press the F10 key to enter BIOS setup. Navigate to the Power section (the exact label might vary a bit depending on your specific model, but look for anything related to power management). Look for options like Wake on LAN, Wake on USB, or Automatic Power On—disable all of these. Once done, press F10 again to save your changes and exit the BIOS.

• Tweak Windows power and device settings:

  1. Right-click the Start menu, select Power Options, then click Change plan settings > Change advanced power settings. Expand the Sleep category, then Allow wake timers—set both On battery and Plugged in to Disabled.
  2. Open Device Manager (right-click This PC > Manage > Device Manager):
     • Expand Network adapters, right-click your network card, go to Properties > Power Management, and uncheck the box that says Allow this device to wake the computer.
     • Expand Universal Serial Bus controllers, right-click each USB Root Hub entry, go to Properties > Power Management, and uncheck both Allow the computer to turn off this device to save power and Allow this device to wake the computer (if the latter option exists).

• Rule out hardware triggers:
  Unplug all external devices (like USB mice, keyboards, external drives) except for the power adapter. Try shutting down or putting the computer to sleep again—if it stops auto-powering on, you know one of those devices was causing the issue. Plug them back in one by one to find which one is the culprit. Also, double-check that your power button isn’t stuck (HP mini power buttons are small, so sometimes they don’t pop back up fully).

• Update system and drivers:
  Open Windows Update and install any pending system updates—sometimes bug fixes resolve power-related glitches. Also, make sure your HP mini’s power management and network drivers are up to date. You can do this via Device Manager (right-click the driver > Update driver) or using HP’s official support tools.

If none of these steps work, it might be a minor issue with the motherboard’s power module, but in most cases, the above fixes should get things back to normal.

备注：内容来源于stack exchange，提问作者Mohammad hasan Javid