I am trying to have a dual boot machine where I have the option of pressing F12 and choosing which SSD it boots too.  Below are the steps I followed;

 

Changed Boot list option to Legacy 

http://i.imgur.com/8z158Lf.jpg

 

Changed SATA operation to AHCI 

http://i.imgur.com/OMGKhrW.jpg

 

F12 boot menu works fine, choose USB Dell Windows 7 

http://i.imgur.com/gAzSUI6.jpg%C2%A0

Once this Windows 7 language screen appears the mouse and keyboard are dead.  I have tried this in the different USB ports on the back with no luck. 

http://i.imgur.com/DqMgwOA.jpg

 

 

Any suggestions?

Thanks