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PatchCleaner [FREE]

PatchCleaner [FREE]
Windows Installer Directory cleanup utility

Windows Installer Directory
When applications are installed and updated on the Windows Operating System a hidden directory c:\Windows\Installer is used to store the installer (.msi) files and the patch (.msp) files.

Generally these files are important as during updating patching or uninstalling software it will use the .msi/.msp files. If you blanketly delete all the files in this folder, you will find yourself needing to rebuild windows.

Over time as your computer is patched and patched again, these installer files become outdated and orphaned. They are no longer required, but they can take up many gigabytes of data.

PatchCleaner identifies these redundant/orphaned files and allows you to either:

1.) (Recommended) Move them to another location. If you want to play it safe, just move them to another location, and if things start going wrong you can always copy them back.
2.) Delete them.

How it works
HomeDev has had many queries about how PatchCleaner works and if it can be trusted to do the right thing.

Its pretty simple. The windows operating system holds a list of current installers and patches, that can be accessed via WMI calls, (Windows Management Instrumentation ).

PatchCleaner obtains this list of the known msi/msp files and compares that against all the msi/msp files that are found in the c:\Windows\Installer directory. Anything that is in the folder but not on the windows provided list is considered an orphaned file and is tagged to be moved or deleted.

HomeDev cannot warrant that PatchCleaner will not find a false positive and delete a required patch which is why we recommend using the move feature, that way you can always copy the patches back if required. Please see the Known Issues List at the bottom of the page

After 18,000+ downloads, I have had some feedback that a few users are having problems where PatchCleaner is being detected as Malware.

Firstly let me reassure you that there is no Malware contained within PatchCleaner.

To stop PatchCleaner from being detected as malware would require purchase of an SSL certificate and digitally signing the software.

Given this is 100% free software I cannot justify the expense in doing this, so I do apologise for any extra clicks you may have to do to install PatchCleaner but I don't think this will change any time soon.

Known Issues
The product uses an operating system obtained list of known patches that are required by the computer, everything else is considered orphaned. The following is a list of known issues where PatchCleaner may incorrectly delete a required Patch causing an installer or updater to stop working.

1.) Adobe Reader - The automated update packages can error after running patch cleaner. The work around is to uninstall and re-install to upgrade Adobe Reader. The issue is PatchCleaner correctly retains the last Adobe reader patch, but the Adobe reader updater uses more than just the last patch when updating, so the missing patch files for previous, previous versions will cause the auto updater to fail.

Windows 7 / 8 or 10, (not compatible with windows XP)
.Net framework 4.5.2

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