I've tried searching for both the Update manager and the Software Manager and all I can find is the Synaptic Package Manager, which wont help me update to 13.04 of Ubuntu. I've tried looking around but they're nowhere to be seen. I'm using version 12.10 of Ubuntu.
EDIT:I also cannot do any shortcut commands for some reason other than copy, paste, and those. The "windows key" does nothing as well as ctrl-alt-t. I replaced the update-manager with software-manager and it ran! thank you!