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Can anybody tell how to completely clean up your desktop computer from QGIS files ( Windows Registry, user folders and program folders)?

It's for QGIS version 2.4 and 2.10.

'Ok' and 'cancel' buttons are missing from dialog boxes in QGIS project, and despite uninstalling QGIS the same error appear when installing new version, even 2.8.5 (Long term release).

Therefore a complete clean up of QGIS is needed.

marked as duplicate by Matthias Kuhn, Evil Genius, Mapperz Jan 4 '16 at 14:33

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Try Revo uninstaller with deep scan for leftover files and registry entries option after uninstall. http://www.revouninstaller.com/revo_uninstaller_free_download.html

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