I just installed Windows 8.1 Professional on my Acer Aspire 5738 from Dreamspark. I need to know whether there is any significant improvement in audio or graphics quality when I install Realtek audio driver (since obviously I can play songs without any issues) or Intel Graphics Driver for my laptop. Otherwise I could very well use the extra disk space to store my documents. What would I miss without them?
You do not need to install the specific driver software if the generic Microsoft drivers are working to your satisfaction. If you do choose to install them, ensure they are Windows 8 compatible.
Just be aware some special features or functions which may be specific to the manufacturer's drivers software may not be available to you.