Hi all,
Please, is there any one can help , I leave you the link for my bios backup, it is the A21 bios for Dell 3558 (SN-3NX9ZD2),
https://www.sendspace.com/file/dolwvd
official bios : https://dl.dell.com/FOLDER06384835M/1/3458A21.exe
to unlock the hidden options in the bios
thank you so much
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