ringrazio infinitamente Federico83 per avermi risolto il problema...:ok::ok::ok::ok:
- - - Updated - - -
posto la soluzione ... magari puo essere utile anche ad altre persone.
Installing Windows 8 in UEFI mode from USB
1. Make sure you have your Windows 8 ISO image file ready
2. Attach USB flash drive (4GB at least) to your computer
3. Download Windows 7 USB/DVD download tool
4. Run the tool:
1. Step 1 of 4: Select Windows 8 ISO file
2. Step 2 of 4: Click “USB device“
3. Step 3 of 4: Select your USB device from the list and click “Begin
Copying“
4. Step 4 of 4: Wait till copying finishes
5. Create a new folder on your computer disk, for example, C:\WIN8USB
6. Copy all the files from your USB thumbdrive (the one you got prepared at 3rd
step) to the newly created folder (created in the previous step)
7. Right click on the USB drive icon in Computer window and select “Format…”
from the context menu. Make sure you select “FAT32 (Default)” in “File
system” drop down menu. Click “Start” and wait till the drive gets formatted
8. Copy all the files from the folder you created earlier (C:\WIN8USB, for
example) to the formatted drive
9. Your Windows 8 installation USB drive is ready. Attach it to USB 2.0 port
(some computers doesn’t support booting from USB 3.0 ports) of the
computer you want to get Windows installed
10.Reboot computer and launch BIOS/UEFI config menu (on most computers it
can be done pressing F1 after computer starts)
11.Find settings related to UEFI. Make sure you have something similar to “UEFI
Only” or “UEFI first, legacy second” selected. If you leave the setting as
“Legacy first“, Windows will proceed with regular, non-UEFI installation
12.Save settings and reboot the computer. It should boot with the USB drive
13.Proceed with Windows installation normally
That’s it. Even there are quite a lot steps listed, they are pretty simply. The trick there
is that Windows 7 USB/DVD download tool formats the USB drive as NTFS and that
type of filesystem is not supported for UEFI booting. That’s why you need to
reformat the drive and copy the files back. During formatting, MBR is preserved so
the thumbdrive is bootable.
link download Windows7 USB/DVD:
images2.store.microsoft.com/prod/clustera/framework/w7udt/1.0/en-us/Windows7-USB-DVD-tool.exe