Can't Uninstall 2 Games

My son wants to play 2 games Stronghold Crusaders and Empire Earth but, we
can't get them to play . When I tried to uninstall both games I get error "
the supported file could not be installed, could not find file". They do show
up in my add/remove programs and when I do a search they are there. Therefore
I want to just uninstall them and reinstall them and maybe that would work.
Can anyone tell me how to go about this?

Thanks
.

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