I'm running QGIS 2.8 Wien on Windows 8.1. I got this error:

The program can't start because qgis_core.dll is missing from your computer. Try reinstalling the program to fix this problem.

I got the same error last week, uninstalled and reinstalled QGIS and it worked. But there must be a better way to fix the error than reinstalling QGIS every time it bombs out.

  • Does this question help? gis.stackexchange.com/q/120346/43 Mar 27 '15 at 11:06
  • Are you running qgis.exe or qgis.bat?
    – Nathan W
    Mar 27 '15 at 12:24
  • I'm clicking the shortcut that comes with a standard Windows installation of QGIS. The shortcut target is: "C:\Program Files\QGIS Wien\bin\nircmd.exe" exec hide C:\PROGRA~1\QGISWI~1\bin\qgis.bat Mar 27 '15 at 12:44
  • Does qgis.bat typed manually inside the OSGEO4W shell work?
    – AndreJ
    Mar 27 '15 at 15:20
  • Yes, it works - same if I find the qgis.bat file in Windows Explorer and run it. Mar 30 '15 at 6:52

It is probably due to the antivirus software. QGIS works fine at first but this problem arose after a reboot. Try to disable the antivirus software and try again but please do so at your own risk.

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