[ubuntu] Update Manager won't work right

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http://ubuntuforums.org – I'm running 12.94 on an older Compaq laptop. There's a file in Update Manager listed under "Other updates" and it reads: "Apply a diff file to an original" and the name of the file is "patch." Because of this "other" update, Update Manager will not allow any of the other files to be updated. Yes, even when I uncheck this "patch," Update Manager still won't allow the other files to be updated. I've already tried to install Synaptic and it won't install. What to do? (Hardware)