When you select a program in the Programs and Features dialog and click Uninstall, Windows will display a confirmation prompt by default.

In case you've accidentally chosen the option In the future, do not show me this dialog box in the dialog, you can revert the setting back using the steps provided in this article.
Click Start, type regedit.exe and press ENTER
Navigate to the following location:
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Explorer \ DontShowMeThisDialogAgain
Backup the branch by exporting it to a file
Delete the value named {948e51fb-0a48-44f0-86ac-33c36def540c}
Exit the Registry Editor