Quest Pro won't link after last update
It's on the latest firmware. Meta Quest Link software was updated yesterday. Haven't used it for a week. Worked fine for several weeks. Tried it today and could not get it to link in spite of numerous headset and computer reboots. Tried disconnecting headset, rebooting computer, rebooting headset, reconnecting headset, tried a couple of times -- no joy. Tried several different USB ports, tried a different cable (the official Meta cable), no luck. I guess a firmware or software update broke it, again. Mega frustrating.
Nick-of-Time My QPro is working fine with the latest non-beta v79 updates (QPro and PC meta-link). I suggest you try reinstalling your meta-link drivers like so;
Manually Run the Oculus Driver:
Close the Meta Quest Link app completely.
Press the Windows key + R to open the Run dialog.
Enter the driver file path: C:\\Program Files\\Oculus\\Support\\oculus-drivers (this path may vary depending on your installation).
Find and open the oculus-driver.exe file.
Relaunch the Meta Quest Link app and try connecting your headset again.This often works for me. Otherwise, contact meta support including your log file and see if they can help. Good luck mate and cheers.