Irrational Keyboard Input Delay

Question

I have a Lenovo Flex 5 1570 that runs Windows 10. I have a really odd issue with my keyboard, that's most noticeable when I play video games. It's not "active" all of the time, and I can't figure out any specific triggers or applications that start it. Sometimes it's worse, sometimes it's less present, and sometimes it's completely nonexistent. It produces the following symptoms:

 - Delayed keypresses

 - Prolonged keypresses

 - Negation of keypresses

 - Double keypresses

It makes video games unplayable and typing extremely unsatisfying. For example, I'll see that I accidentally forgot to press a button, so I press the appropriate key and two of the same key show up. Any key-controlled character in a video game will be almost completely out of control.

I did some testing, and found that when it is present, it affects all keyboards, including the integrated one, a USB keyboard, and even the on-screen keyboard. I've done BIOS updates, virus scans, reinstalled my keyboards over and over, and even deleted windows updates to see if they would make a difference.

At one point, it did. I didn't have an issue for about 2 months. I decided then that it was some sort of glitch that got fixed. Later it came back. I asked for help from Microsoft and Lenovo and didn't get any solutions. This time I have included a video of me tapping keys as accurately as I could along with a metronome here. It's fine for the first 30 seconds, but after that there is very visible stuttering.

My computer features an i7-7500U CPU, 8 GB of RAM, and an nVidia GeForce 940MX graphics card, so I doubt that hardware is the issue here.

I would really appreciate any help.

Moved from: Windows 10 / Devices & drivers

Answer 1

Hi BrazenBunnies,

Based on the information you have provided, considering that the issue happens with all the keyboards, as well as with the on-screen keyboard, then this issue could be with the device performance.

You can consider performing a clean boot. A clean boot will help eliminates software conflicts that occur when you install a program, update, or when you run a program. For instructions, refer to this article.

Note: After clean boot troubleshooting steps, refer to the section "How to reset the computer to start as usual after troubleshooting with clean boot" in the provided link to return your computer to normal startup mode.

You can also check this article on how to improve PC performance in Windows 10.

Let us know how it goes and we'll assist you further if needed.