Admittedly, I did install the program whilst having - but not having set to run at boot - Comodo antivirus. But then I uninstalled Comodo, uninstalled ESET, and reinstalled Comodo. But now - and indeed previously - shortly after booting my whole machine, save the mouse pointer, freezes. Even CTRL-ALT-BACKSPACE (which is meant to log off and back on again) does nothing. Nasty. Advice, please?
EDIT: the problem seems to occur only when I open folders (and, so far, all those folders have been on my desktop).
EDIT 2: ah, the problem may have been that somehow I had a setting set to invert
