Some disk fix and defragmenting utilities, while perfectly safe if used when P-files are visible, can become confused when P-files are invisible.  Their confusion can result in deletion of your P-files.  
    
The solution is simple and desirable.  Simply designate any disk fix and defragmenting utilities as P-files so they can only be run when P-files are visible.  You don't want un-authorized users running these utilities anyway. 

CHKDSK.EXE is the only program we've tested that becomes confused, so we've take the liberty of designating it as a P-file so it can only be run when P-files are visible.  The versions of SCANDISK and DEFRAG that come with Windows 95 do not get confused and therefore need not be designated as P-files (but you may want to do it anyway to prevent un-authorized users from using these programs.)  All other disk fix and defragmenting utilities should be designated as P-files. 
        
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