Left shift + o,l and 9 not working on my dell laptop.

Special keyboard drivers are rare.  The vast majority of Win7 systems will install drivers for the vast majority of keyboard varieties, and do not require special drivers.  Specific keyboard drivers are only needed for special, non-standard keys.

If you plug in a standard USB wired keyboard to your laptop, you will see, in all likelihood that it works perfectly.  When you plug it into a running system, you will note that Win7 notices the keyboard and installs its own driver for it, in a few moments and quite automatically.

Keyboard drivers would rarely be the cause of specific keys not working, like the ones you named.

The keyboard in your model Dell, is easily replaced.  It is likely rather inexpensive.  I would not be surprised if you found it for around $20 from Dell.  I have replaced keyboards in Vostro models which appear to have the same keyboard.  It is a matter of depressing 4 tabs, disconnecting a cable and the reverse.  Time about 10 minutes.  My cost was $13

The instructions on how to do it are easy to follow are on Dell's website:

http://downloads.dell.com/manuals/all-products/esuprt_laptop/esuprt_inspiron_laptop/inspiron-n411z_owner%27s%20manual_en-us.pdf

Thank you, replacing the key board solved the problem.

Most  likely answer is that your keyboard is failing.  What model of Dell laptop do you have?

On some laptops, the replacement is easy and not expensive.  On most, however, you need the services of a competent technician because it requires a lot of disassembly to get to and replace the keyboard.

Thank you for the response.  Model: Dell Inspiron 14Z N411Z. I suspected it may be a driver or software issue.  Could not get a new/updated driver for the keyboard.

Most  likely answer is that your keyboard is failing.  What model of Dell laptop do you have?

On some laptops, the replacement is easy and not expensive.  On most, however, you need the services of a competent technician because it requires a lot of disassembly to get to and replace the keyboard.