Ok Create an USB Bottable Formatted Dos and copy into all file from this foder then reboot your laptop from USB in DOS and launch the batch file Flash.bat.
Let me know
Tool for ISB DOS :
http://rapidgator.net/file/aed7999f2b7fe...W.rar.html
Choice Dos internal !
Lenovo Bios 1.21 71cn51ww Menu Unlock + No Withelist
http://rghost.net/52596850
Please upload screen shots to check it.
Look here :
http://www.bios-mods.com/forum/Thread-RE...1#pid66171
Let me know
Tool for ISB DOS :
http://rapidgator.net/file/aed7999f2b7fe...W.rar.html
Choice Dos internal !
Lenovo Bios 1.21 71cn51ww Menu Unlock + No Withelist
http://rghost.net/52596850
Please upload screen shots to check it.
Look here :
http://www.bios-mods.com/forum/Thread-RE...1#pid66171
[size=undefined]Your Brain [/size]. . . . It's the best tool U can use ! 
[size=undefined]Don't FLASH the Bios Mod if You get a Size Alert, You risk a Brick !!! [/size]
Donate to me for my work, click here BDM

[size=undefined]Don't FLASH the Bios Mod if You get a Size Alert, You risk a Brick !!! [/size]
Donate to me for my work, click here BDM