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I want to uninstall and completely remove QGIS installation from my computer (Windows Vista). I have uninstalled it and when i try to reinstall it says it is already installed on the system.

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2 Answers 2

Reset to default
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You can make sure all folders in your hard drive and your .qgis2 folder (C:/Users/You/.qgis2) are deleted. You could also delete the Registry entries for QGIS by running the regedit program and searching for QGIS:

QGIS registry

Hopefully when you restart your computer, you will be able to reinstall QGIS again.

Hope this helps!

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    This worked and i have reinstalled successfully.
    – mapperx
    Commented Jul 1, 2015 at 11:34
  • @mapperx - Brilliant buddy! Glad you got it working =)
    – Joseph
    Commented Jul 1, 2015 at 11:35
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There are comprehensive uninstall programs available which do thorough searches and removal for all leftover files and registry values which should solve the problem. An example is Revo Uninstaller.

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