Windows 8.1 Pro x64 UEFI very slow boot and shutdown

EVEN SHORTCUT SHUTDOWN HAS STOPPED WORKING. WIN 8.1 is a disaster. I will be going back to 8 with the Stardock front-end as before.

Hi, that is a lots of post and MS is still very quiet, they must be waiting for Santa.

Since I use the Charms shutdown I must say that I am almost back to normal, less than a minute to shutdown and about 30 seconds to boot. Long delays occurs if I choose to Restart, from Charms or from the Start menu (ClassicShell), it takes about 3-4 minutes. It is faster to do a Charms Shutdown and power on.

I do not shutdown from the power button or from any othe regular shutdown options (i.e Start menu or Alt+F4 or Win+X ), only from the Charms (mouse pointer in the top right corner, click Settings, then click Power, the Shutdown.). Win+I brings you directly to the Charms Settings with the power button.

It would still be nice that Microsoft answers this thread, just to say hat they are looking into the cause of these long Shutdown and boot up when using Win 8.1 options of shutting down other than Charms.

Happy Holidays and be patient, applies all the Windows update, keep your driver up to date and you will see Win 8.1 is getting better. I had no crash in win 8.1 for months while I had many with Win 8 previously.

How can you go back? As far as I know you need to have a complete system image from Win 8. I didn't make one! :/

TLDR:  My problem caused By Qualcomm BT/WIFI drivers.  Uninstall them to correct issue.

Background:

I just ran into this problem today with a Dell XPS8700 with Win 8.1 Pro, on a SBS 2011 domain, Secure Boot enabled, along with UEFI and GPT partitions.   Boot drive is a 256 GB Plextor M5M mSATA SSD.

Up till today my startup and shutdown times were acceptable. 

However, all of a sudden today my system would take about a minute or more to shutdown to power off or reboot.  Cold Boot times were still ok.   Research brought me to this thread.

The Dell XPS 8700 comes equipped with a combo Qualcomm Atheros 802.11 B/G/N 2.4 WIFI and Bluetooth adapter.  The software suite is supplied by Dell for this adapter but is provided to Dell from Qualcomm.

After reading this thread I uninstalled the WIFI and Bluetooth adapters from device manager and then uninstalled the Dell/Qualcomm driver suite from Programs and Features.

This corrected the problem immediately.  Shutdown times are now 6-7 seconds.  Startup times are 35 seconds to login screen  (I have turned off the hibernation file so that will lengthen the startup/reboot times a bit).  As a test I enable the hibernation functionality and my startup times were about 17 seconds to the login screen, using the charms button shutdown prior to cold boot.

In my case the problem was definitely caused by the Qualcomm BT/WIFI device and drivers.  After I uninstalled them the problem disappeared.  On reboot the devices were automatically reinstalled by Win 8.1 using generic drivers, but the slow shutdown/reboot problems have not reappeared.

I'll just run this way for a while and will comment again if the problem reappears.  I don't really use the BT or WIFI on this system I'm not suffering any loss of functionality.

Only way is to go back to factory settings (which was on Win 8) and then restore from an Acronis security that I took before the upgrade....... I hope.