a few days ago I decided to update my QGIS 2.14 into a QGIS 2.18.
I uninstalled the old version and installed the new one, normally.
Then nothing at all happened when I pressed the icon.
I uninstalled, deleted all registry mentioning old installations of QGIS, reinstalled 2.18, and still nothing.
I tried installing QGIS OSGEO4w, but again, nothing.
I changed the Qgis.bat to add the system folder
PATH %systemroot%\system32; %systemroot%; %systemroot%\system32\wbem
, and nothing..
I really don't know!
Clearly I also tried to install back the 2.14, but it does not launch either.
Any suggestion?
Best Answer
You can delete the OSGEO folder, including all the installed applications. (This is usually installed at C:/).
If you do this, and then run the most recent OsGeo4W installer and install again, that should sort it.