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Revo is a good uninstaller for 32-bit XP. It didn’t work really well for Windows 7 (even for uninstalling 32-bit application). I’m commenting for the free version.
I never try Glary in Windows 7. The last time I install it for trying it was in XP and I uninstall it after a few days of trying it. I forgot of what I don’t like about it but I can say for sure that I don’t need it in my computer.
There’s nothing wrong in trying it yourself and see if you like it or not.
There’s another alternative for you, it’s a small portable application named IObit Uninstaller. I’ve using the newest beta version of it in Windows 7 64-bit. It’s way better than Free Revo, though it sometimes still leaves a few remnant in registry (e.g. when you uninstalling Adobe Reader, Java).
I know many if not all forum member here didn’t like IObit for a good reason. However, I can say that IObit Uninstaller is a decent uninstaller and pretty harmless if you use it carefully.
An advice for you, never uninstall Microsoft application or any application which using Windows Installer (e.g. Ms Office, Windows Live, etc) using third party uninstaller. It’s always best to use Control Panel Add/Remove program for this kind application and clean the remnants afterward using CCleaner (though it’s usually will leaves a remnants even after this, but it’s better than using any third party uninstaller)