Hi, I was using CADian2008 on my laptop running on Win Vista. I have recently upgraded my OS to Windows 8. I installed CADian 2008 from my installation CD on Win 8 but when I try to run the program it pops out a message stating that I need to be an administrator to run the program. I get no messages that allows me to ask for a new authorization key. Please help and also kindly send me a new authorisation key that wil;l allow me to run the program. In case you need any other purchase details please let me know. Thanks and regards, Sunaabh