Windows 11 Random Ctrl and C Key Presses

[GD 2W10]

Hi everyone,

I’m hoping someone can help me diagnose a very strange Windows 11 HID/input issue.

Hardware

Motherboard: ASRock Z690 PG Riptide

Logitech G502 HERO mouse

Logitech keyboard

Logitech webcam

Operating Systems Tested

Windows 11 (full installation): Problem occurs

Windows 11 WinPE: No problem

Windows 10: No problem

I have also performed a completely clean installation of Windows 11, including installing it onto another drive, and the problem still occurs.

Symptoms

Windows boots normally.

After Windows has been running for a while (not immediately after boot), the system suddenly behaves as though the Ctrl key is being held down.

A few seconds later it transitions into repeatedly pressing the C key, and from that point it continuously types “C” until I intervene.

Important observations

This is not a physically stuck keyboard key.

I have tested multiple keyboards and the exact same behavior occurs.

Once the phantom C key begins, unplugging the physical keyboard does not stop it. Windows continues receiving phantom keyboard input.

The only thing that immediately stops the behavior is uninstalling the HID Keyboard Device in Device Manager.

However, after approximately 15–30 minutes, the problem eventually returns.

HID devices

Windows reports three HID Keyboard Devices.

I checked the Hardware IDs for all three.

All three report VID_046D (Logitech).

The Hardware IDs are:

Device 1

HID\VID_046D&PID_C336

Device 2

HID\VID_046D&PID_C336

Device 3

HID\VID_046D&PID_C08B

So every HID keyboard-class device currently detected appears to belong to Logitech hardware.

Additional information

I do not have Logitech G HUB installed.

The issue occurs using Microsoft’s default drivers.

Windows 11 WinPE does not exhibit this behavior.

Windows 10 on the same hardware did not exhibit this behavior.

The issue survives a completely fresh Windows 11 installation.

Current thoughts

At this point I no longer suspect the physical keyboard itself because:

I’ve tested multiple keyboards.

Unplugging the keyboard does not stop the phantom input.

Instead I’m wondering if:

one of the Logitech devices is exposing a faulty HID keyboard interface,

Windows 11 has a compatibility issue with one of the Logitech HID interfaces,

or there is some USB/HID driver interaction specific to Windows 11.

Has anyone seen a Logitech device generate phantom keyboard input like this under Windows 11?

Is there a recommended way to determine exactly which HID interface is producing the Ctrl/C key events?

Any suggestions would be greatly appreciated.