@Wimb, My computer is a Windows 7 64 bit platetform and I use Make_PE3 with a source Windows 7 x86 (install.wim). I prefer to build Make_PE3 with a x86 source for more compatibility. Sorry, but I did not try to build pe3_amd64.iso to test and investigate Explorer Shell and MMC. Make_PE3 script was complied using the 32bit compiler and work fine on 32 bit machines but fails to work on 64 bit machines (dircopy, filexist, ...) I anderstand your choice to have only one version of Make_PE3, i test it, it doesn't work for 64bit machines. I am not a specialist of autoit and I don't find a solution on internet to build an only version of Make_PE3 for the 2 platetforms. I am at the beginning of my tests on Make_pe3, to work on a French version or other language, do i have to modified things in Optimize_explor.txt, Optimize_Profile.txt, WIN7_add_explor.txt, WIN7_add_files.txt Example: \windows\winsxs\manifests\x86_microsoft.windows.c..-controls.resources_6595b64144ccf1df_5.82.7600.16385_en-us_020378a8991bbcc2.manifest (exist) \windows\winsxs\manifests\x86_microsoft.windows.c..-controls.resources_6595b64144ccf1df_5.82.7600.16385_fr-fr_a4864b8b8c14c4c9.manifest (exist) \Windows\System32\en-US\accessibilitycpl.dll.mui (don't exist) \Windows\System32\fr-FR\accessibilitycpl.dll.mui (exist) ...