Backslash button randomly appearing in documents

[computer_uzer]

While using Microsoft products like Outlook, Excel and Word, the backslash key will randomly start typing repeatedly as if someone is holding the down.ie ////////////////////////////////

It will not stop unless I push the escape key or close out the program. I am using a new laptop with no issues of liquid spillage or dirt. 

I  have done the following:

restarted computer many times. It does stop the issue but it has came back randomly again. 

used a can of air for the particular key. The key is not sticky when pushing it normally. 

updated all software drivers for computer. Restarted computer. 

What as can I do? Has anyone else heard of this issue?

[Echo_Lake]

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

Don't worry as I'll be glad to help, I have a few troubleshooting steps we could try to fix the issue:  

Use HP PC Hardware Diagnostics to complete functional test of the keyboard and identify any problems with the hardware.

NOTE: Bluetooth devices are not currently supported.

1. Download the latest version of HP PC Hardware Diagnostics.

2. In Windows, search for and right-click HP PC Hardware Diagnostics for Windows, and then select Run as administrator.

   

3. Click Component Tests, click Input Devices, and then select the Keyboard Test.

   

4. Click Run once to begin the test.

   The test ends when you complete the tasks or after 3 minutes.

For more information about using the HP PC Hardware Diagnostics for Windows, go to HP PCs - Testing for Hardware Failures.

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.