The mathematics of accidental file erasure is alarming.A PC user is likely to spend an average of one hour in a frantic effort to recover the file (or files, or an entire directory) before turning to the help desk. Just two occurrences per day – a conservative estimate for a corporate environment – translates to a minimum annual productivity loss of 520 hours, nearly 14 40-hour weeks.Office colleagues, in their attempts to help, add to lost productivity and are more likely to hurt, not help, any chance of success.