What about SQL Server 2008 when the evaluation period has arrived

The official download of the SQL Server 2008 Evaluation version of the default evaluation period of 180 days, the arrival of 180 days after the expiration of license expired, needs to be reassessed;

Click Start-All Programs-microsoft SQL Server 2008-Configuration Tool-sql Server Installation Center

Then click on the left side of the maintenance, click on the right version of the upgrade, and then follow the prompts always point to the next, to the product key when the input

Development version: Can evaluate the passed serial number

Enterprise Edition: You can evaluate the serial number passed

If the above operation also prompts the evaluation period has passed, modify the registry:

The "Commonfiles" value in the Hkey_local_machinesoftwaremicrosoftmicrosoft SQL server100configurationstate is changed to 3 to perform the operation again.

After the evaluation is passed, you may encounter situations where the connection database instance is not connected, you need to verify that the SQL Server service is turned on, go to the Configuration Management tool, and open the SQL Server service.