Windows 10: Dell Latitude 7420 Selecting & Deselecting Out of Current Window

Hello!I have a Dell Latitude 7420 running Windows 11 Enterprise that was recently given to me by my workplace. Within the past week it has started selecting and de-selecting windows that are active, sometimes while I'm in the middle of typing so that it cuts me off from typing. The mouse never moves, and the windows never pop up in my screen besides the one I already have open, but the cursor will disappear and the window will 'fade' to show it's not currently selected. I have tried disabling the touchpad, the keyboard, and the touchscreen to see if any of those are having phantom touch issues

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New Dell Latitude 7420 - BSODs

I am also experiencing the same issue with a Dell Latitude 7420 with 32GB of RAM. My suspicion has been bad RAM, but because it is on the motherboard, I cannot remove to test. When I contacted Dell, they insist that there are no hardware problems because all diagnostics are passed. I have reimaged this machine multiple times, tried all driver updates... removed all driver updates. Ran driver updates from Intel vs. Dell, etc. I will test the C-States Control disable to see if it helps. Please update if you hear of any additional suggestions.

 

New Dell Latitude 7420 - BSODs

Good article here. I've seen 3 primary issues with the Latitude 7420. 1) WiFi disconnects especially on WD19 dock, 2) USB Microphone issues, and slow boot times on 1.9.6. I was stumped for hours trying to figure out why one 7420 took a full minute + to POST vs another 7420 which was 5 seconds. Turns out if you rollback from 1.9.6 to 1.9.3 it's nice and quick again. Hopefully Dell gets this cleaned up in BIOS 1.10 or later. I recently went out to Intel's website to pull down 22.80.1 to see if that helps clear up the event logs. As far as the Jabra usb mic issue the only tried and true fix I've found is reset/reimage computer if reinstalling the realtek audio driver doesn't hold up. Still very much work in progress for this model.

 

New Dell Latitude 7420 - BSODs

Do we know the root cause for this issue? Is this about a hardware error that Dell tries to mitigate with a BIOS update that actually disables some functionality? Why does'nt all 7420's have this problem?