OptiPlex 5050 skylake cpu使用USB及UEFI模式安裝Windows7

1.設定BIOS,設定disabled Secure boot,開啟legacy mode.

2.使用refus製作可開機USB,檔案格式為FAT32,模式為GPT,ISO檔須含SP1

3.下載DELL DriversPack for Win7
http://en.community.dell.com/techcenter/enterprise-client/w/wiki/12241.optiplex-5050-windows-7-driver-pack

4.建立目錄D:\Drivers,裡面再建兩個子目錄,mount及USB

5.將下載的DriversPack解壓縮到D:\Drivers\USB目錄

6.從隨身碟裡的source將boot.wim及install.wim複製到D:\Drivers

7.更新boot.wim
dism /mount-wim /wimfile:boot.wim /index:2 /mountdir:mount 
dism /image:mount /add-driver:"USB" /recurse 
dism /unmount-wim /mountdir:mount /commit 

8.確定install.wim索引
dism /Get-WimInfo /WimFile:install.wim

9.更新install.wim
dism /image:mount /add-driver:"USB" /recurse
dism /unmount-wim /mountdir:mount /commit

10.將更新完的boot.wim及install.wim複製回隨身碟的
source目錄即可

參考文章:https://community.spiceworks.com/how_to/125921-how-to-add-drivers-manually-to-usb-drive-to-install-windows-using-a-usb-3-0-port