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Possible Duplicate:
Why is uninstalling programs on Windows so slow?

What do the uninstallers do throughout the uninstalling process?

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marked as duplicate by Ƭᴇcʜιᴇ007, Hello71, Simon Sheehan, 8088, Nifle Nov 27 '11 at 21:51

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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If life was only so simple. . . – surfasb Nov 26 '11 at 18:54
    
up vote 1 down vote accepted

They delete registry entries, etc. Besides, MSI also saves uninsstall data in case the uninstall fails or is cancelled.

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