i cant really speak for Nuhi so dont take this as an official response but my understanding is its just to keep the windows EULA and the nlite license from conflicting. if you make modifications to your own personal copy thats between you and MS but if you modify a companies windows install with nlite and they require support from MS, MS could refuse to support them because of nlites modifications. if nlite 'allowed' corporate use they could be held liable for damages. Example: http://support.microsoft.com/?kbid=948343#method2 (concerning Vlite but its the same situation) now thats far from an official response but you get the idea. It would seem a simple thing to me to add a "use at your own risk...by using nlite you assume all risk of data loss or loss of support....etc....blah, blah,blah...."-type clause and let whomever use this wonderful application wherever they wished. Just a thought.