Either "RTL8187B, UI and Driver auto install package(Support XP/Vista/Win7) version 1181", or "RTL8187L Windows7 InstallPackage (Beta) version 1316(Beta)"
I don't know which would be most appropriate. If neither work, you may want to try uninstalling the existing driver before installing again.
But, I think RTL8187 is supported by Windows Update, so I don't know why you are having problems.
Edit: Your first post referred to 8187. Were you mistaken?