problems with unity and gnome classic desktops - how to reinstall and clean them

I have ubuntu 12.04.02 and I always uses kde 4.10.1. Sometimes I need to swith to unity or gnome classic (with effects), the problem is that when I log in with one of them I can't access to "settings menu" or other menus because they do not appear. I think I have messed up some time ago but I don't remember. Maybe it is a problem concerned to compiz. I have tried to use

Code:

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unity --reset

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and

Code:

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rm -rf .gnome .gnome2 .gconf .gconfd .metacity

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commands to reset gnome2 and unity but still the same thing.

So is there a way to reinstall compiz or gnome classic and unity in order to clean them like when I have installed ubuntu first time? (I just would like to reinstall them without making any change to kde desktop.)

Thanks

You could run a

Code:

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sudo apt-get purge compiz*

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Which will remove everything associated with compiz.

Then you can reinstall it using

Code:

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sudo apt-get install compiz

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That will reinstall it like you are looking for.

thanks, I did that but same problem with gnome classic, some settings menu do not appear.

edit: I re-installed also gnome classic and unity (also common files) and now everything works fine thanks