Bobs Track Builder requires Windows XP - I do not support Vista or Windows 7. Although some people are successfully running BTB under Vista/Win7 I do not officially support it since I have not tested BTB under either of those operating systems. This is starting to change now as I now have Win7 x64, but it's early days and I need more testing under this operating system before I can officially support it. If you do wish to persist with Vista/Win7 then you do so at your own risk. Make sure everything is "Run as Admininstrator"; that includes the HID.exe that is used to generate your HardwareId.txt. Better still, right-click on the icon, go to Properties, select the Compatability tab and tick the "Run this program as an administrator" checkbox (at least this is what I see under Win7). Remove all USB drives and reboot before running the HID.exe. Some Vista/Win7 users report that their HardwareId number changes after a reboot and that only rebooting again will get the BTB license working again. "No support" means I do not assist those with problems under Vista/Win7. These threads are your only means of support. People that email me will be directed here. If you wish to move your license to a machine running XP you will need to wait until your license has expired, then generate and upload a new one on your XP machine. The good news is that with the next beta version I am attempting to make sure BTB works properly under Windows 7. Fingers crossed!