Windows 10: Sound drivers stop working on Dell Latitude 7400, Windows 11

So, I’m facing an issue with my laptop’s sound drivers after upgrading from Windows 10 to Windows 11. On Windows 10, everything worked fine. However, after the upgrade, the sound driver stopped working. I tried troubleshooting it, it says no sound device attached. I also reinstall the window hoping that a clean installation of Windows 11 will fix it, but after getting updates it stopped the sound drivers to work.Furthermore, I tried reinstalling the driver from the Dell website. The driver start working instantly, but it requires a restart and after that it stops working. In the device manager

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Latitude 7400 series & Dell Docking Stations - wifi unusable when undocked

Have an issue with a couple of different Dell Latitude laptops in the 7400 series. They're connected to a number of different Dell docking stations. When undocked the wifi completely disapears and the only way to
get it back is to reboot the laptop. All drivers and firmware are up to date. Has anyone seen this issue?

 

No sound after returning from Sleep Mode Windows 11

I have a Dell Latitude with Windows 11. When my PC returns from sleep mode the sound stops working. When I check Sound Settings the laptop's integrated speakers (Intel Smart Sound Technology) are still selected.

I'm usually quite good at troubleshooting PC issues. I've followed all of the standard Windows troubleshooting steps including uninstalling and reinstalling the drivers. Any suggestions?

 

My PC is rejecting windows 11 | DELL LATITUDE 7400 2-in-1

Thank you. Please update BIOS to ver 1.27

https://www.dell.com/support/home/en-in/product...

and let me know if it works.