MSI blast is an internal utility that we only use in cases where systems have been highly corrupted. The preferred, and much safer, method for removing NI software is by using the dialog in Programs and Features or Add/Remove Programs. MSI blast skips steps that normal uninstallation uses and can result in system corruption if used incorrectly.
Please refer to the message I posted above.
Please refer to the above post by Jared R on 05-04-2012.