Quest 2 not shown in Windows Explorer; ADB works fine

I am trying to connect the Quest 2 to a laptop over USB to copy files, but it does not show up in Windows Explorer.

I started with the provided cable in a USB-C port, but then the device was also not recoginised by ADB. When using a regular USB port on the laptop the device was recognised and Windows showed Ready to use, but it does not show up in Windows Explorer. I then started adb and it first came up as unauthorised and after allowing connection in the headset it came up as device, so that works fine. But it still did not show up in Windows Explorer.

I found this support page https://support.oculus.com/795778631158860/ that tells me to check the driver in Windows device manager. It did have a warning sign so I tried to update the driver. First automatically, but that gave no update and then followed the steps in the support page. But the MTP USB driver was not in the list.

Tried several options to install the MTP driver:
The MTP Porting Kit, did not work
The Media Feature Pack, but got the message that this update was not for this Windows version (the page unfortunately has no informtion on what version I should use, so I just picked the latest one)
Found this site https://thegeekpage.com/fix-mtp-not-working-in-windows-10/ and tried options 1 and 5, but no effect either

Tried disabling Developer mode, as I found on Reddit somewhere (sorry can't find the page back), but that also did not help.

The weird part is that a week earlier I connected the headset to another laptop and it worked perfectly. Connected over regular USB, Allow connection and presto, the Quest 2 showed up in Windows explorer. Could copy files and install the test version of our apps.

So I'm out of ideas and I hope someone can help me. I realise the problem is most likely in the laptop and not in the Quest 2, but maybe someone has seen this before and found a solution.