Itunes wont install..mobile device error.

I'm running Windows 7 64bit, when I tried to update the current patch to itunes it messed up everything associated. Uninstalled, deleted folders etc. and then tried to reinstall, it gets to starting services and then error pops up stating it cant install mobile device stuff. I recently (after about 50 attempts to uninstall / reinstall) hit ignore on mobile install, and then ran a fix it device that uninstalled mobile and now Itunes will open. However, this defeats me syncing with my iphone. Please help me get this working all the way around.