Using the device manager

Hello,

My question has to do with using the device manager.  In general, if you go into the device manager and find that one of the items has a yellow ?, does this mean that the drivers are missing for that piece of hardware?  If so, is there an automatic way to find the needed drivers rather than having to spend time searching on the Internet for that particular hardware and its manufacture?  Also, can the yellow ? indicate any other problem besides missing drivers?  If so, what is the quickest way to identify the problem and solution?

My specific question has to do with adjusting the refresh rate for the monitor.  I just had a new hard drive installed and when I go to Display Properties >> Settings >> Advanced >> Monitor, it does not allow me to adjust that refresh rate.  Instead it says "use hardware default settings".  In the device manager, video controller and multimedia audio controller are both yellow.

Thanks,

Steve