Collected a new log and did some additional testing, it seems to be about Bluetooth.
- Turning on the headphones during the scan makes it unable to connect with the PC, as soon as the scan is done then it connects.
- The scan gets stuck on "com4.scr" in the System32 folder from windows.
- Cancelling after it reached "com4.scr" takes 90 seconds before it really stops.
During this the cancel button becomes grey but the animation bar keeps going and the timer also keeps ticking.
If this info provides a possible solution then I'm happy to try it, else I might just go with a fresh windows reinstall.
The new log is 213MB so i cannot upload it here.