SQL Server evaluation period is over

Opening SQL Server prompts: The evaluation period is over. For information about how to upgrade the beta software, visit the Http://www.microsoft.com/sql/howtobuy

Here's how to fix it:

SQL Server 2008 installation requires a workaround that is always restarted:start-up run-->regeditFind HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager locationthen right-click PendingFileRenameOperations in the right window, select Delete, then confirm

Method One

1 Entering the installation center

2 Maintenance--Version upgrade

3. Step by step, when prompted to enter the registration code, please enter the following registration code according to your upgraded version

SQL Server Developer:pttfm-x467g-p7rh2-3q6cg-4dmyb
SQL Server ENTERPRISE:JD8Y6-HQG69-P9H84-XDTPG-34MBB

4. Wait until you press the upgrade button. You can use it when you're done.

Method Two
If the above method does not solve your problem, then you can try to modify the registry:
Hkey_local_machine/software/microsoft/microsoft SQL server/100/configurationstate CommonFiles value changed to 3
Then repeat the steps for method one

Method Three
Generally carried out method two may not remove the evaluation period has been past the hint, then only use the last move, that is to modify the system time, modify your normal use of SQL Server for some time on the line, and so when there is time to reload it