The strange part is that in the past Explorer managed to refresh correctly despite of Litestep being the shell.

Also, the CS was mentioned as a quriosity. I don't care about it so much, since I rarely play these days, but it's annoying nevertheless.
Besides, I don't think I have (m)any useless modules, and CPU usage is at steady 0%, so it shouldn't be the problem...

Ah, I miss those MS-DOS times for their simplicity. Computers don't behave rationally these days.