Windows 8.1 Pro x64 UEFI very slow boot and shutdown

It might be worth firing up event viewer and seeing if you can see any errors.

I did the 8.1 x64 upgrade not so long ago and experienced very similar problems, but then I noticed that the Bonjour (Apple) service (I uninstalled Safari browser months ago, so no idea why this service should still be hanging around) was failing every time I booted the machine.

I uninstalled Bonjour from the command line, and now my boot / shutdown is back to normal.

1. Open a CMD window with elevated privileges (press windows key and x to bring up a menu, and then select the option: "Command Prompt (Admin)".
2. Use the following command sc delete <the name of the service>

My solution is very specific, so not sure whether it'll be exactly what you need, but just a suggestion anyway :)

Hi, for me the thing that causes this is the Bluetooth-device. Disabling it in Device Manager makes Windows go back to 10 s shutdown, as before 8.1. 

In my case the device is Qualcomm Atheros AR3012 Bluetooth 4.0 + HS. Maybe new device drivers will solve the problem.

any fix on this issue?

been experiencing this also.. anf also the 100% disk usage, i hope microsoft release updates

I was doing some checking with msconfig and even disabling everything my shutdown is over 4 minutes.  However, at one point I got into a weird startup where I think some of the Microsoft items did not load.  Had a couple of things I noticed in that configuration.  1 was that the computer would not see any network but would connect to the network.  The other item I had was a warning that said:  "Failed to connect to a network service.  Windows could not connect to system event notification service".

However, while I was having that problem the shutdown was almost immediate.  To fix the problem went into msconfig and disabled and then enabled everything and everything is back to working - but I am back to the slow shutdown.

I think the problem is due to an issue with the wireless connection.  If I reboot with the wireless turned on the reboot takes about 5 minutes.  If I reboot with the wireless connection turned off the reboot is fast.  I also tested with the wireless turned off and I was connected to a network cable instead.  That reboot was fast.  There is definitely a problem related to the wireless connection.  Unfortunately I don't know how to solve it other than using the workaround, which is to reboot or shutdown with the wireless turned off.

Guys, I just wanted to shed some light on this an echo the above comments. It IS a wireless problem, moreso a Bluetooth problem. After 8.1 my bluetooth would not hold a connection and my PC took 3 mins to get back into windows from pressing restart.

MS tried to fix my PC (for free) for 3 hrs and could not, DELL (it's an XPS 15) didn't know either. I had emailed killer / bigfoot and had them open a support ticket due to the yellow check mark under 'bluetooth audio device' but they never got back to me.

I went to the site again to open another one and noticed they had added a BETA driver for my card, I gave it a go and now both bluetooth and the restart work.

The only thing is file transfers across the netwok are about 9 MB/s instead of an average 24 MB/s

I'll watch it for a day and if it stays the same I'll be asking Dell for a new wireless card. I'd write Killer Networks a stern email but I can't be bothered - hopefully this helps someone.

Cheers,

TC

I was doing some checking with msconfig and even disabling everything my shutdown is over 4 minutes.  However, at one point I got into a weird startup where I think some of the Microsoft items did not load.  Had a couple of things I noticed in that configuration.  1 was that the computer would not see any network but would connect to the network.  The other item I had was a warning that said:  "Failed to connect to a network service.  Windows could not connect to system event notification service".

However, while I was having that problem the shutdown was almost immediate.  To fix the problem went into msconfig and disabled and then enabled everything and everything is back to working - but I am back to the slow shutdown.

I think the problem is due to an issue with the wireless connection.  If I reboot with the wireless turned on the reboot takes about 5 minutes.  If I reboot with the wireless connection turned off the reboot is fast.  I also tested with the wireless turned off and I was connected to a network cable instead.  That reboot was fast.  There is definitely a problem related to the wireless connection.  Unfortunately I don't know how to solve it other than using the workaround, which is to reboot or shutdown with the wireless turned off.