Win8.1SE can't switch to Apps by category desktop

After I built a Win8.1SE with source Windows8.1Enterprise_x64 and AIK tools for Win8PESE it works perfect on PC with XP OS. With pressing Ctrl+Win I can switch the desktop with shortcuts for the apps to Apps Category view! This is amazing and very comfortable for using! But this build doesn't works well in PC with Windows 7/8 OS. I made building on PC with Windows 7 and Windows8.1 AIK /64bit and again - everything from the main desktop is working well , but when I press Ctrl+ Win, PC can't switch to Apps Category menu. Instead that, it shows an error and automatically restart the PC.What could be a reason?

I have the same issue. After switching to the Apps category menu if you are quick enough you can launch an app without a problem. seems delayed for me. It does it also when you try to scroll over to see apps not in the initial screen. Other than that everything seems to work well.

I am testing in a VMWare environment and using Driverpacks.

In my opinion this is due to a limitation FBWF.
If you make the size FBWF> 768Mb, then no error.

http://www.mediafire.com/download/ih79g9x105vr0py/FBWF_64_1024.zip

I met this boring problem too, It seems to be related, among others, to the number of shortcuts created for the Modern Apps View or StartScreen 

I see two things in relation for now:
Windows Driver Foundation was added, 2 weeks ago, in Mandatory. It already seems to improve this concern. I do not know if you have already downloaded it?
And Indeed, as Doberman said, it seems to be some limitations in Windows8.1 FBWF driver 
Like Doberman , I added also the Windows Embedded tandard 8 fbwf.sys x86/x64 (delta patch to remain legal). WES8 fbwf seems to work better for our need.
In addition, we can choose 768 Mb and 1024 Mb Fbwf size, if you have enough RAM.

By selecting all the Apps and components, it worked properly here with 512 Mb 
Updated scripts are on server, I hope it will be better for you, let me know.

Hi ChrisR,

please put a short informative text to fbwf plugin (2 - Shell & Config) 
maybe to FAQ txt too (with links) 

you sure know all things from your memory, not all rest