The latest BIOS for that model is A06. [URL]  
Kindly check if my laptop BIOS is correct to use it for this model? Kindly see below info for your reference. My laptop hard drive got broken, so the technician replace it. As I check the drivers in the website, to check if all has been installed again. I saw that the BIOS is different from the installed to the website. Version 6.1.7601 Service Pack 1 Build 7601 Processor Intel(R) Core(TM) i5-2450M CPU @ 2.50GHz, 2494 Mhz, 2 Core(s), 4 Logical Processor(s) BIOS Version/Date Dell Inc. A02, 10/19/2011   if this is not the right BIOS for my laptop. would it be possible to assist me to correct it. I hope to hear from you soon, because I think this is one of the cause why my laptop is slow and other key function is not working. thanks, blue  
14z-N411z - BIOS VERSION CHECK