Taskbar shortcut location

located in

%APPDATA%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar

 

http://blogs.msdn.com/b/ben/archive/2009/10/01/taskbar-pinned-shortcuts-location.aspx

http://superuser.com/questions/855784/taskbar-pinned-shortcuts-location

 

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Windows Installer CleanUp Utility

This Utility clean the Windows\Installer folder and may also solve installation problems with MSI

https://technet.microsoft.com/en-us/magazine/2008.08.utilityspotlight.aspx

Wikipedia

Download from

http://www.softpedia.com/get/Security/Secure-cleaning/Windows-Installer-CleanUp-Utility.shtml

 

 

(Replace by MS Fix-it: https://support.microsoft.com/en-us/mats/program_install_and_uninstall