Do I have the latest Bios?

okay, I believe I updated my BIOS.
When I ran the disk, I selected option 1 which *I hope* was the right option. It seemed
successul. I have gone to RUN> and typed in system information and get the following:
SMBIOS Version: 2.6
is that correct? I have successfully updated my BIOS?
Also, what were the two options when running the BIOS upgrade? I wasn't clear on what all the
terminology meant nad if I was doing the correct procedure or not or do I need to do both?
thanks
LENOVO 8BET54WW (1.34), 11/2/2011 - W520 Model 427639U - Windows 7 - 6.1.7601 Service Pace 1 Build 7601 - intel core i7-2820QM CPU @ 2.3ghz, 2310 mhz 4 cores - 16gb Memory

Harrisb is correct, The latest BIOS for the W520 is version 1.40.
Here is the link to see the BIOS updates for the W520, on the bottom of the site there are instructions to determine which version you currently have. You can find all of your Drivers and Updates from the Lenovo W520 Driver Matrix.
There are two ways to update the BIOS:
1. EXE file - this is what many people do because they can do it inside Windows which is more convenient. But it can also carry a certain amount of risk. If something goes wrong, you could potentially be left with an incomplete update thus bricking the machine and requiring a motherboard replacement under warranty. I recommend doing a system backup before any BIOS update or changes.
2. .ISO file - an ISO is a CD or DVD image encapsulated on the file. You can burn the file to a CD or DVD with a tool like ImgBurn. After the CD/DVD is created, you can boot the W520 from it and follow the instructions to update the BIOS. This is more of a hassle but considered safer because there is a reduced amount of risk another program might interfere with the update process and leave it incomplete.
If all of this sounds scary, I would recommend finding an IT Professional, Partner or Service professional to do this for you. All Lenovo Products come with a 1 Year Limited Warranty, if you would like to have more in depth troubleshooting or support, do not hesitate to contact your support center. You can verify your warranty status here.
Thank you for being a part of the Lenovo Family,
Catie
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