I can confirm the new Realtek Audio Driver (6.0.9210.1, A10) is the culprit.  I tried to reinstall it but the same issue occurred (slow restart). I installed the previous version (6.0.9098.1, A09) and the issue stopped. As a side note, the new driver was also failing to reactivate Wireguard automatically on restart (for the ones using Wireguard). Hopefully, this can help others until a new driver is released.
Dear All, I am using XPS 9500 for an year now. For last two to three days the restart has become very slow. I have done the updates available from Dell and Windows 10 Nearly 2 mins. If I shutdown and switch on - it is fast. Any help will be appreciated.
Restart has become very slow