Anthi,
If you are looking for general information about the HP Pavilion G6, that may be enough for that purpose.
When you are seeking specific information for YOUR computer (drivers, specifications), you should provide exact information.
The full model name:
HP Pavilion g6-2255ev
OR
The Product Number:
C0C39EA
Your computer's Driver and Software webpage (assuming Windows 8):
HP Pavilion g6-2255ev Notebook PC Drivers
Driver = software program that controls hardware
Commentary
In general, you should not run any driver older than those that come on the system originally. There might be exceptions to that rule, but as a novice user, you would normally depend on the configuration that came with the computer when it was new.
Over time, things change.
Changes include but are not restricted to:
Bugs might be discovered in the programming code, new models of the same kind of computer might come onto the market and need to be added to the driver's "list of supported models", new features might be needed to keep a device driver working properly with a new Operating System (Windows 7 >> Windows 8).
All or any of these changes can affect your computer's working environment. The extent to which one computer is impacted by a driver change might be more or less than other similar models. Sometimes a new version of a driver will be introduced and while it might greatly benefit one group of users, the impact is negligible for other owners of a similar computer.
If a driver change is considered vital to increase working stability, to provide security, or to provide the means of supporting a model or Operating System previously unsupported, that driver update may be considered critical.
You should always consider your working environment when you add updates.
If HP says a patch (driver update) is critical, then the chances are the change impacts many users, many computers, and is considered important enough that you should consider installing it for the safety and stability of your computer.
It does not mean you should install updates without first having your backups up-to-date, your recovery media available, the time to deal with any "other than desired" results; you should have in hand the means to get back to where you are "now".
As long as you understand that no patch / update / software or hardware change is completely free of risk, then after you have protected your enviroment (backups, backups, and one more backup), then you can install whatever updates and patches and software that look interesting, that seem to be helpful, and that are stated by HP to be Important or Critical. Updates that are described as routine may include important enhancements - you can install these.
The fact is that no matter what public source one uses, the information about a driver is spotty at best.
If the Update is listed in your computer'sdriver webpage, it is a suggested update for YOUR computer model.
HP Updates: I use the Driver Webpage to determine what is necessary for most of my systems.
Windows Updates: I have these set to notify -- I decide when / if / which to download and apply. In generaly, I select the Important Updates and I never install the "recommended" updates.
I only install Updates when I have time to deal with any "unexpected" results.
I have one test computer on which I use the HPSA to install updates. It is set to notify.
Recommended Updates -- I take these as a "one at a time" thing. I do not install most recommended updates - I rarely, in fact, install "recommended" updates. Understand that my computer's are running pretty much standard and I do not require the additional software or changes offered in the "recommended" category.
If the Update is on a list of "recommended" updates either in Windows Updates or in the HPSA, then you can decide for yourself based on what little it tells you. I have found that I can ignore "recommended" updates and be very happy.
You can read many opinions on this subject - in the end, you have to decide for yourself. It is one of the joys and burdens when you are your own administrator. I suggest you read what others say about updates, when / if / how to apply them. There are certainly a great many opinions out there -- everyone has a version of the best way to do this.
I know it is not "the answser" -- at best, this is advice to help you become better able to understand and manage your own situation.
Happy Computing!