I reverted back to the previous build and the problem seems to be solved (so far)
After today's update (build 10586.11), mine seems to be fixed.
Did a couple of restarts, including "cold" starts and the "welcome screen"comes up for about 2sec. Hoping it stays this way
UPDATE: After the machine has been off for ±8Hrs, the problem is back ... I find it weird that it worked as expected for a while after that update ... how is this possible?
My next try will be to do a complete format & reload with the new ISO ... anyone done it yet?
I did the clean install yesterday and I'm still having the same problems with slow welcome screen as well. I formatted my SSD and booted with usb. I rarely get an 8 second boot from time to time after the clean install but the usual time is closer to 40 seconds. I notice a flicker when the welcome screen starts and the accent color that is chosen will flash for a second then the screen stays on welcome for the rest of the time. This makes me wonder if it could be something to do with the GPU as I have an integrated intel and an Nvidia card and there have been other issues with Nvidia and windows 10.
You should not be getting a slow welcome screen. As you stated, it is most likely the GPU chips.
Pull the NVidia and see if that fixes the issue.
What model is the card and how old is it?
I'm on ATI, so did MS now mess it up with addon GPU's ?
I have Nvidia GeForce GTX 980M, the integrated is an Intel HD Graphics 4600. I unfortunately can't pull the Nvidia physically as it is soldered to the motherboard on this model of laptop but I disabled it in the device manager and restarted after that. The restart went from manufacturer logo to desktop in about 8 seconds. I did a normal shut down after that just to test it further and got the same lengthy welcome screen.
How To Install Windows 8.1 On Mac Without Boot Camp
The only time that you really would need to dual boot on a Macbook, is if you work from home and your employer requires that you use Windows as your main OS, which really you can get away with not using it and just run Mac OS-X, which is 100% times better then Windows.
ATI is owned by AMD now. AMD is coming out with a whole new Control Ce24th, nter that blows the current one away. It is supposed to release on the 24th, which is this Tuesday. Problem is that if you use Legacy drivers for that GPU, you are going to most likely be SOL.