Old Software wont uninstall

I am trying to uninstall old Arduino software (1.8) and reinstall new versions however, I cannot uninstall the old version completely. Every 5 minutes the old installer pops up with the License agreement. Is there a way to ensure the old software is completely uninstalled? Or is there a way to disable this license agreement popup?

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Start taskman and end the arduino process (right click >> end task) when it pops up.