How to uninstall a program ?

i am using windows 7 and i installed Nero 8 but after few months when i found that Nero 8 is not much useful than Nero 7 i tried to uninstall it but when i open control panel Nero 8 was not there but it was installed in my system. i tried windows installer clean up,Revo uninstaller etc but still it is not being... show more i am using windows 7 and i installed Nero 8 but after few months when i found that Nero 8 is not much useful than Nero 7 i tried to uninstall it but when i open control panel Nero 8 was not there but it was installed in my system. i tried windows installer clean up,Revo uninstaller etc but still it is not being removed . after that i deleted all Nero 8 files manually and tried to install Nero 7 but it says that your system already has being installed with newer version of Nero . now please help me out how to uninstall Nero 8?
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