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My Software Installation Failed and I Receive Error Messages when I Try to Reinstall. How Do I Fix the Failed Install? When I was installing or uninstalling my National Instruments software, using the .msi file, I received one of the following types of error messages: 1.) Another installation is in progress. (Even though there is not another installation in progress.) 2.) Please uninstall the previous URL: http://digital.ni.com/public.nsf/allkb/8703592D07C91AD586256B44000248C6