How to force uninstall Oblivion without disk?

I'm clearin up shit outta my programs so minecraft might have a chance of being playable on my shit computer, and when I try to uninstall it, it says it needs the disk. Can I delete it some other way? thx

I'm not sure why you think uninstalling Oblivion is going to have any effect on how well Minecraft plays on your computer, but try the program uninstaller included in CCleaner

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