http://www.zwsoft.com/forum/viewthread.php?tid=2549 Hi, I have a problem with my new laptop which is window 8. I have this software of ZwCAD 2009 Professional and i install in this new laptop, the dongle red light is keep on blinking and the Product ID is not same as what my paper shown when i purchase this software. Help pls.. Thanks. Felicia felici6184 2012-12-29 10:58:30 http://www.zwsoft.com/forum/viewthread.php?tid=2549&pid=16650 please refer to this tip, hope it can help u! [url]http://www.zwsoft.com/Service_Support/ser_zwcad/zwcad_knowledgebase/Utilities/784.html[/url] qinmuting6947 2013-02-17 12:06:21