From: jsowden@americansentry.net   
      
   On 04/29/2016 04:55 AM, JJ wrote:   
   > On Thu, 28 Apr 2016 11:14:47 -0700, John R. Sowden wrote:   
   >> In windows, MS sends upgrades which are saved in the remove/modify   
   >> programs section of the 'control panel' area.  My interpretation is when   
   >> an upgrade/security fix, etc. is downloaded, it is then executed,   
   >> modifying the program on the local computer, and the downloaded program   
   >> is no longer needed.  The problem is when I go to delete these from the   
   >> remove/modify listing, I get a message saying that the program "may not   
   >> work correctly".  Are these downloaded programs still required?  If so, why?   
   >>   
   >> John   
   >   
   > Windows updates/hotfixes files update the system files and place a backup in   
   > the "x:\WINDOWS\$hf_mig$" folder.   
   >   
   > The backup files are still required by the Windows internal file checker for   
   > file restoration purposes in case the ones in the "x:\WINDOWS\SYSTEM32" and   
   > "x:\WINDOWS\system32\dllcache\" are deleted or improperly updated to an   
   > older version.   
   >   
   > Since those updated files aren't included in the original Windows CD-ROM,   
   > deleting the backup files would mean preventing the deleted/modified system   
   > files from being restored to the recent version ever installed. Thus if the   
   > backup is not found, the only way to restore the system file is by restoring   
   > them from the CD-ROM, which aren't the recent versions.   
   >   
   Thanks for the clarification.  I normally use Ubuntu, but I have some   
   windows boxes for running windows specific programs,  i was just trying   
   to clean up the hard drives.   
      
   John   
      
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