If you are still on the Windows 7 Beta you may want to move to the Windows 7 RC fast. Starting July 1st, the Beta will start to reboot every 2 hrs and expire Aug 1st.
The Windows 7 RC download program closes August 15th. After that, you won’t be able to get the download, but you can still install the RC and get a key if you need one.
To get a key, just go to the Downloads page and follow the instructions.
If you’re using the Windows 7 Release Candidate, if you wish, you can give feedback to Microsoft.