[SOLVED] Unable to install Windows 10 build 14986 after slimming down

Hi,
I have been trying to slim down the iso of Win10 build 14986 as well as 14971. I have used both WinReducer EX-100 - v0.9.15.0 as well as v0.9.14.0 for this purpose. It slims down fine but when I boot from the USB stick I prepared using winreducer, It fails to initialize the installation, crashing with a stop error 0xc21a. Here is the screenshot of the error.

I can't seem to figure this one out. I have checked the BIOS setting too, all OK. Tried to use the v0.9.14 on two different ISO, and tried to use v0.9.14 as well as 0.9.15 on same build. But no joy yet. Anyone faced this issue yet? Someone please help...

Try not remove all the USB drivers. Especially:
- USB Hub (EHCI, UHCI, OHCI)

deVilbaT wrote:

Try not remove all the USB drivers. Especially:
- USB Hub (EHCI, UHCI, OHCI)
Thanks.. I'll try this and will update my findings.. btw here is the wccf file i used.
WCCF

ruchirrathore wrote:

deVilbaT wrote:

Try not remove all the USB drivers. Especially:
- USB Hub (EHCI, UHCI, OHCI)
Hi, I tried it. I created another iso while keeping all USB drivers intact. But it didn't wotk.    Installation still crashing with same screen showing same error code. Any other suggestions please? 

Hello,

The first thing, I may tell you an advice : have you tried to create a virtual machine using VMware Player or Virtualbox to install your ISO before using them in your real computer. This will prevent you some installation errors

The second thing is the RS2 ISO are not officially supported by EX-100. Only Microsoft Windows 10 official released are officially supported, like RS1. But this doesn't not mean, I will not try to solve errors

This may be a missing "Drivers", so here is how I encourage you to do :
- Unchecked all "Drivers" to see if the trouble is in here

And if it won't work, try this in an untouched and official ISO :
- Select a minimal list of components and try to install your ISO (before apply your changes, do not forget to use "SAVE" button to backup your wccf, which will be named : "Test_000")
- Then use this ISO, to remove new short list of components and try to install your ISO (before apply your changes, do not forget to use "SAVE" button to backup your wccf, which will be named : "Test_001")

Please let me know the result.

I have the exact same issue on this build. The same preset works on the rs1 build.

savale wrote:

I have the exact same issue on this build. The same preset works on the rs1 build.

It seems that in RS2 builds MS has changed some coding. It installs "System Reserved" patition silently instead of informing on screen. During installation of full ISO in "Custom Install", clean installation of a separate partition, I provided an uunpartitoned space of 20GB, and Windows created a main partiton of 19.9GB, instead of 19.5GB like earlier builds. However, after completion of installation, when I checked disk management, I saw a hidden "System Reserved" partition too. 

It could mean, MS has changed the way Windows install, and it may have something to do with this problem too.

hi, does this still happen? if yes which iso do you use?

hi, i checked it with the latest Version of winreducer and TH2 RS1 and RS2 and it seems to be ok. if it still happens for you update winreducer to the newest Version and also upate your ISO with the latest updates (that solved many Problems for me)