(example: 2.79b release)
(example: 2.80, edbf15d3c044, blender2.8, 2018-11-28, as found on the splash screen)
Short description of error
I've been using blender for two years and I haven't got any problem till now, every time I try to open blender the command screen pops up and shows an error but it closes instantly not giving me time to read it, I've tried uninstalling and installing again several times, I've even tried using different blender versions and nothing seems to work, also in my blender files I don't have a startup.blend file.
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).