Total QGIS newbie here.
I installed 2.16.2 on a Dell Optiplex GX260 with Pentium 4 @ 2.4 or so Ghz, 2GB RAM. 30-something GB free on the hard disk after installation.
I started up the QGIS "desktop" (without GRASS) and tried to navigate to a folder containing ESRI shapefiles I wanted to edit. QGIS hangs up, apparently trying to open the directory, with a rotating "wait" icon on the directory. According to Task Manger, CPU use is pegged at 100%. Memory useage is at 859MB so I assume disk-swapping due to insufficient RAM isn't the problem.
I tried exiting the application normally, but qgis-bin.exe remained running, still pegging the CPU. Closing this module from task manager finally lets CPU usage return to the minimum.
Then if I re-start QGIS desktop, it makes an uncommanded return to the rotating wait icon on the same directory I previously tried to open. CPU usage goes back to 100% and stays there.
What should I try now? Is CPU speed the issue? Should I re-install on a faster one?