How to reduce "\system32\catroot" folder like this !

when build win8.1pe with full network and audio, it's good working , but i want reduce size some folder  to speed up boot .

anybody may reduce this folder => 5MB ! Example "Win PE XP / 7 / 8 /8.1 (x32-x64) Native EFI by Xemom1"

i Copy this folder in to my winpe but it's not working  . How to reduce it ?

Thank you !



Lancelot edit:
topic title fixed
How to reduce "\system32\caroot" folder like this !
-->
How to reduce "\system32\catroot" folder like this !

You can reduce it by deleting the files inside.

The hard part is to know which files are required.
The only tool that helps to find out is Sysinternals Sigcheck

Thank You JFX ! I'll try !

Helo JFX, I was used sigcheck to get list catalog file "unsigned" and remove them, but all files in caroot is "unsigned" .

Code: [Select]

sigcheck -c C:\Windows\System32\catroot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}

Please you do explain for me and help me !

Sadly it's not a straight way to find catalogs.

ex. show catalog that signs C:\Windows\explorer.exe

sigcheck.exe -i C:\Windows\explorer.exe

I'am check with

Code: [Select]

sigcheck -i "%SystemRoot%\System32"

and every file in this folder is Unsigned catalog file and have no the info about Certificate of Catalog file ?



Can i'am build wrong way ?

Thank for reply !

If you get "unsigned" for all there must be something really wrong.
Most files should be signed.
Have you already delete files in catroot?

No no ! I did tried build a new Windows PE and do not modify anything . After starting and i do use sigcheck to check it :(