I saw some things from DELL that make me assume that the DELL Optiplex 7010 computer supports Windows Vista. I looked on DELL Support for you and found a link where you could get Windows Vista drivers for the DELL Optiplex 7010 computer.
If you want to look further, search the Web. You can also look on the DELL Support page where I found the answer that made me assume that you have drivers for Windows Vista on the DELL Optiplex 7010 computer.