Computer problem - Automatically pressing UP Arrow key

Question

Please help me with this problem, I'm freaking out.. Even if I unplug laptops keyboard, it's still pressing Up arrow key somehow. Sistem is formatted so there is no virus

I recorded what's it doing

Video link :

https://www.youtube.com/watch?v=C_fwMRY189k

Answer 1

Does the problem persist when you boot the machine into Safe Mode?

Answer 2

This is beginning to look like a hardware rather than a Windows problem. Let's try and nail it like this:

1. Keep tapping F8 at boot time.
2. Select Repair Mode from the menu.
3. Open a Command Prompt.
4. Type notepad.exe and press Enter.
5. Type a few lines of text. Does the cursor-up problem persist?

Answer 3

I think it's a hardware problem, because when I hit F8, it automatically goes up every 7 seconds. Only solution I have is that I go to gpedit.msc and enable function Prevent Installation of Devices not described by other  ... 

And then I remove keyboard in device manager. But I can't sell my laptop with this problem :S

I don't understand why it does this, even though the keyboard is unplugged. What are chances there is something wrong with BIOS?

Answer 4

Yes, it' still does that

Answer 5

I don't understand why it does this, even though the keyboard is unplugged. What are chances there is something wrong with BIOS?

Since this appears to be a hardware problem, a hardware forum would be a better place to ask this question.