After several failures using 5.84 to erase unused disc space, even in Safe Mode on my XP2 Pro (only got to about 6% before locking up) I followed advice in another thread and re-installed 5.7. This did the job in Safe Mode, so there seems to be an issue with 5.84, at least on some systems. I have no Norton software on my system, so that wasn't my issue.
JB
JB