I have a Mesh AMD Athlon XP2000+ 75GB system with 512mb RAM. On checking hard disk space i found that instead of having approx 63GB free space i now had only had 11GB ! All programs, folders etc add up to 11GB. It seems that somehow the figures have been reversed. Run defrag. checked the system ith Norton system works. I ran Sure Delete prior to noticing problem, don't know if it's connected.