if you get thereinafter bsod error while booting windows vista dvd, try to swap names of Windows\System32\halacpi.dll and Windows\System32\halmacpi.dll something like this> cd Windows\System32\ del hal.dll ren halacpi.dll halacpi.dll2 ren halmacpi.dll halacpi.dll ren halacpi.dll2 halmacpi.dll if you want to modify install dvd, you have to do it in two places, in sources\boot.wim and sources\install.wim the easier way is to build your own custom windows preinstallation environment (win pe), where you modify only sources\boot.wim, then install from precopied folder and before first restart delete hal.dll and rename hal*acpi.dll as mentioned above. to build win pe, use waik (you can find more here)> http://technet2.microsoft.com/WindowsVista/en/library/129a1712-e3d8-46c1-bc09-a14349dc67db1033.mspx?mfr=true or the easiest way is to start installation from running system and also before first restart delete and rename relevant files ---------bsod--------- A problem has been detected and Windows has been shut down to prevent damage to your computer. If this is the first time you've seen this Stop error screen, restart your computer. If this screen appears again, follow these steps: The BIOS in this system is not fully ACPI compliant. Please contact your system vendor for an updated BIOS. Technical information: *** STOP: 0x000000A5 (0x00000011,0x00000007,0xFFD0D010,0x0100000E) ---------bsod--------- posted here> http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=1438402&SiteID=17