QGIS not launching

Question

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?

Have you tried running the qgis.bat file or loading the OSGeo4W Shell and typing in qgis? — Joseph, Commented Jan 16, 2018 at 11:21
Might I suggest starting again: uninstall QGIS, delete the .qgis2 folder (located in /Users/You/.qgis2, back up any scripts or models if you made any), if using Windows run the regedit program and delete everything related to QGIS. Restart your computer then do a clean install using the correct QGIS setup (32-bit or 64-bit). See if this helps. You shouldn't need to modify any paths, it's weird nothing seems to load. — Joseph, Commented Jan 16, 2018 at 11:37
I tried this several times, actually, and it didn't work at all. I don't know why. Furthermore, now that I have installed everything through OSGeo4W I don't even have the uninstal option! — user34423, Commented Jan 16, 2018 at 11:56
Please make sure you uninstall your osgeo4W install via the osgeo Setup : gis.stackexchange.com/a/256500/25139 — gisnside, Commented Jan 16, 2018 at 20:41

Alex Leith · Accepted Answer · 2018-01-16 23:14:18Z

1

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.

answered Jan 16, 2018 at 23:14

Alex Leith

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Thanks. I installed already everything using the latest OsGeo4W installer, and yet nothing was starting..
– user34423
Commented Jan 17, 2018 at 13:10
Is your OS 32 or 64 bit? What version of the installer did you use?
– Alex Leith
Commented Jan 17, 2018 at 21:11
It's a 64bits. The installation through OsGeo gave some error at the end, but I don't know what exactly. I'm going to try again now. I downloaded the latest version a couple of days ago but I cannot read the version.
– user34423
Commented Jan 18, 2018 at 8:38
You'd better take note of the error, hey!
– Alex Leith
Commented Jan 18, 2018 at 11:26

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