Running from the CD is fine to get an idea of what you get, but that's about it. Any changes to configuration, like putting the close X back on the right, will only be effective after proper installation (either stand alone or dual boot with Windows). If you really don't want to install it, then you can use VirtualBox or VMWare on Windows and run as many Linux distros as you like within that. It's also a good way to practice installing an OS, in the virtual environment those programs provide, ready for if you do take the plunge and install it for real.
If graphics are working well enough for you, then there's nothing to do as regards drivers. It's very rare these days that any device (other than graphics cards) requires special attention, and it's usually only required for very recent or obscure hardware. But somewhere in the launch menu you'll find an 'additional drivers' application which will detect any hardware (usually graphics cards) which have proprietary drivers available for them. It'll take a minutes or so to probe what you have and then it suggests drivers you may install with just a click (and your user password).
And, before you ask, there's no need to install antivirus software for Linux yet. There are so few exploitable vulnerabilities discovered for it, and they usually get patched pretty quick, that it isn't worth worrying about.