Member Avatar for thePhoenix9

Hi guys,,,

Ive got this new computer, its a proper gaming one, and as any usual person i started downloading programs/software. My computer was working absolutely fine, and still does but when i go to shut down, the screen, keyboard and mouse lights all go off but not the computer lights, nor the fan. i know it is something wrong, because all the lights have gone off before on the computer. i went back to the supplier and he said that it was maybe a virus, and he reccomended updating norton and windows, which is what i did but still, nothing helped. But the guy said, and he sounded pretty sure that it was because ive downloaded a program that keeps the computer running after i press shut down. he said it was something like TNR? TNP? something like that.. he said that i should stop a process from the task manager and see if it works, but in the procceses tab it has got things like windows bootup ect, and if i stop that im worried i might stop the computer. is there anyway i can find out what/how to find the program thats doing this? or someone that can help? at the moment i have to hold in the button, which i dont like doing..

Thanks in advance.

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  • Latest Post Latest Post by caperjack

Dani AI

Generated

This behaviour usually means the OS or a device/driver never lets the machine enter the full ACPI “soft off” (S5) state, or that external hardware is back‑feeding power so the PSU never fully turns off. Possible causes include a powered USB device/hub, a wake‑on setting in BIOS or a network/USB driver that can wake the board, or (less commonly) a faulty PSU or motherboard.

Try this ordered checklist to narrow it down:

  1. Unplug everything non‑essential (USB hubs, printers, external drives, wireless dongles). As @caperjack suggested, powered USB hubs are a common culprit because they can feed 5V back into the PC. Then shut down again.
  2. Boot a Linux live CD/USB and shut down from there. If the machine still stays powered, the problem is hardware/BIOS; if it powers off normally, it’s an OS/driver issue.
  3. Enter the BIOS/UEFI setup and look for power options: disable Wake on LAN/PCI/USB, disable any “Power on by keyboard/mouse,” and check ACPI sleep options (S1/S3/S5). Note original settings before changing anything.
  4. In Windows: use Device Manager to open the Network Adapter and USB Root Hub properties and uncheck any “Allow this device to wake the computer.” Use msconfig to do a clean boot or boot Safe Mode; if shutdown works there, a third‑party driver/service is blocking shutdown.
  5. Check Event Viewer (System log) for shutdown-related errors. This often shows the driver or service that failed to stop.
  6. Hardware check: with the machine off and unplugged, try disconnecting front‑panel power LED/switch connectors and boot to see behavior. If fans/LEDs still never stop after shutdown attempts, consider testing with a different PSU or contacting the supplier under warranty.

Do not kill core Windows processes from Task Manager—stopping “System” or similar can crash the OS. If these steps don’t isolate the fault, it’s reasonable to suspect a hardware defect and request RMA support.

Recommended Answers

All 3 Replies

Member Avatar for Salim9

Well i suggest you to switch of all the buttons . This problem is genral and it has been happened to me also...

Member Avatar for thePhoenix9

Switch off all the buttons?
what did you do when it happened to you?

Member Avatar for caperjack

this happened t ome once when i installed a powered usb hub to the computer ,it was getting power from the psu of the hub ,i had to uninstall the hub

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