The problem is you always install something... Just to name few: LibreOffice, Skype, CCleaner. Frankly re-installation of any not-suspicious software is not worth the hassle just to solve that issue. In other words I don't do blind trial&error troubleshootings. If anyone knows the right registry key that holds the settings or an effective way to force these settings to reset than I'd be most grateful.
Edit:
Opera too...
The problem is specific to Libraries. When I navigate to Users\Desktop\ from Computer the view is set to details, as I want it.
The problem started when I lost Desktop from favorites in the side tree view in Explorer. Now I recall that around that time I deleted a Desktop.ini file that suddenly appeared on my desktop but most probably without the effect we're talking about here.
I do have a system backup (disk image) made not long ago, so I can restore some files when pointed. One last thing I can try is to go to Personalize and choose the default theme instead of my current custom one.