^That. They are almost always old. Unless you are installing your Wifi adapter drivers (not required in W8 or 10), to install the rest of your drivers, do not use that.
Not sure what you mean by this?
In almost every case, the proper, latest driver from the mfg/oem is going to be better than the generic driver Microsoft installs for the device (although occasionally the drivers are identical). A good example of the Win driver being inferior and typically behind the times is AMD and Nvidia graphics cards. There are others.
This case is a particularly good example of when NOT to install from the CD, since the CD has win 7 drivers (which will work 99% of the time in win 10 mind you) and almost certainly, a win 10 driver is available online, which would be more compatible with your operating system. If not, the driver Windows assigns automatically is likely to be better (assuming you are in Win 10) than the out-of-date Win 7 driver.
Having said that, wifi sucks, especially for gaming, and you should always run a wired connection to any gaming PC, even if you have to drill a hole in your ceiling and run a 60FT cable. JM2C.