Vista - Problems Enabling Sound Driver

I disabled my Realtek driver from the playback devices menu after the normal audio level bar stopped popping up upon normal clicking in order to play video games without having to hear the audio, expecting that I could enter the same menu and enable the device when I was done. However, Vista now finds that no device has been installed, despite the fact that, yes, there is an entire folder of drivers that are installed but I guess not enabled? I've been trying to find a place where I can re-enable my drivers, but have not had any luck. Anyone know how to enable drivers without downloading new ones and re-installing?