Phantom unwanted keypresses even when no keybaord is connected

The dash key is automatically pressed every few minutes. No idea why yet.

When does it happen:

  • When keyboard A is plugged in
  • When keyboard B is plugged in
  • When no keyboard is plugged in

What I've tried that solves the problem:

  • safe mode with networking

What I've tried that has no effect on the problem:

  • disabled all startup services
  • closed all taskbar programs

There is a huge list of things that are not running/disabled in safe mode vs normal windows startup. How would I efficiently find out what is causing this issue?

edit: It is a process. I closed 10+ of them so not sure which one it was yet...

|
Hi David

My name is Andre Da Costa; an Independent Consultant, Windows Insider MVP and Windows & Devices for IT MVP. I'm here to help you with your problem.

Try these first to see if they work:

Open Start, type: CMD
Right click CMD
Click Run as administrator

Type in at the prompt OR Copy and Paste these one at a time : (Hit enter after each)

Dism /Online /Cleanup-Image /CheckHealth

Dism /Online /Cleanup-Image /ScanHealth

Dism /Online /Cleanup-Image /RestoreHealth

Also run the System File Checker utility:
Open Start, type: CMD
Right click CMD
Click Run as administrator

At the Command Prompt, type: sfc/scannow

This will check for any integrity violations

Restart your system

Check your hard disk for any errors:
Click Start
Type: CMD, from the results, right click Command prompt
Click 'Run as Administrator'
At the Command Prompt, type: chkdsk /r /f
Hit Enter
When you restart your system, your computer will be scanned for errors and attempts will be made to correct them.

Also, disable fast startup temporarily:

Press Windows key + X
Click Power options
Click Additional power settings under Related settings
Click Choose what the power button does
Click Change settings that are currently unavailable
Uncheck 'Turn on fast startup (recommended)

Click Save changes.

Click Restart now and see if it works.
Best regards,
Andre Da Costa
Independent Advisor for Directly

2 people found this reply helpful

·

Was this reply helpful?

Sorry this didn't help.

Great! Thanks for your feedback.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this reply?

Thanks for your feedback.

Hi David

Since this happens even when no keyboard is connected, this is a software issue . . .


Open the Settings App

Go to Update & Security - Troubleshoot

Run the Keyboard troubleshooter


If that does not resolve this for you

Open Device Manager

Expand the Keyboards section

Right click your keyboard and choose 'Uninstall'

Then restart your PC
___________________________________________________________________

Power to the Developer!

MSI GV72 - 17.3", i7-8750H (Hex Core), 32GB DDR4, 4GB GeForce GTX 1050 Ti, 256GB NVMe M2, 2TB HDD

3 people found this reply helpful

·

Was this reply helpful?

Sorry this didn't help.

Great! Thanks for your feedback.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this reply?

Thanks for your feedback.

Just in case:
Try running these programs:
MBAM free: https://www.malwarebytes.com/mwb-download/
Eset online scanner: http://www.eset.com/us/online-scanner/
Adwcleaner: https://www.malwarebytes.com/adwcleaner/

If these find one or more infections but do not fully remove them it will be wise to register with a malware removal site to receive dedicated malware removal instructions, an expert will remain with you throughout the process until confirmation that your PC is 100% clean.
Malwarebytes virus/malware removal forum:
https://forums.malwarebytes.com/forum/7-windows...
Bleeping computer malware/virus removal forum:
https://www.bleepingcomputer.com/forums/forum22...

Disclaimer - This post contains reference to non-Microsoft websites and there may be ads on the page for products & services including products frequently classified as a PUP (Potentially Unwanted Product). Please thoroughly research any product / service advertised on the page before you decide to use them. Your discretion is very much advised.
Virginia - Time Lady.

Was this reply helpful?

Sorry this didn't help.

Great! Thanks for your feedback.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this reply?

Thanks for your feedback.

 
 

Question Info


Last updated July 20, 2021 Views 3,426 Applies to: