ridgerunner51,   I'm not sure. I didn't have it disappear for me, yet. I try to keep my system up to date. I use Secunia PSI to update and secure my system, along with Update Checker updating the FREE applications.   Dell Support Center 2.0 is No Longer Supported unknown if this was the version that disappeared.     Rick      
The disappearance of Dell Support Center has been discussed several times.  I see where it can be downloaded from Dell, but why would it disappear from my Studio XPS 9100?  My OS is Windows 7 Ultimate 64-bit.
Dell Support Center Disappeared