I was having the same problems as above and after about 8 months of stop start messing about I have also downloaded Google Earth and let it run in the background on the problematic machine.
All is now OK, PAC Runtime is running smoothly and quickly.
Google Earth did not install correctly as the machine has no internet connection but it installed enough to get the program itself running. Because Google Earth can’t connect to its servers it couldn’t show any graphics (maps of earth, etc) but it is still running in the background however.
My post from sometime ago is here…PACProject 10.1001 Build 24 issues
