w7 sur support dvd tu as testé ?
edit : à tester, jamais eu ce problème
" To convert the boot disk from GPT to MBR:
Insert your Windows 7 installation media and boot.
AT BIOS, you will see boot order as whatever, but you will see UEFI dvd, but also will see your DVD writer (say HP 1260i) without any UEFI prefix. Select that boot device (without UEFI prefix)
After booting you see the Install Windows 7 screen, press Shift + F10 to open a command prompt.
At the command prompt, type Diskpart, press Enter.
Type List Disk, press Enter.
Type Select Disk # (where # is the number your drive shows up as), press Enter.
Type Clean, press Enter.
Type Convert MBR, press Enter.
Type Exit, press Enter.
Close the Command Prompt window.
Click the "Next" button.
Click the "Install now" button.
Accept the terms and click the "Next" button.
Choose "Custom: Install Windows only (advanced) "
edit 2 : un sujet ici http://www.commentcamarche.net/for [...] -windows-8
Message édité par Mamito le 06-12-2013 à 09:53:20
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