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This article is about what to do with the "Evaluation period expired" error message when using the SQL server. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

When opening sql server2008 Enterprise Manager, an error occurred: "the evaluation period has expired. Information on how to upgrade the beta software."

Modify the registry: change the CommonFiles value in HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Microsoft SQL Server/100/ConfigurationState to 3

Enter the installation center in the SQL2008 configuration tool

Then go to the maintenance interface and select version upgrade.

Enter the product key and enter the key JD8Y6-HQG69-P9H84-XDTPG-34MBB

Keep clicking on the next step until the upgrade is complete.

There is no progress bar in the upgrade process, just wait patiently for the following page to indicate that the upgrade is complete.

If there is an error in the upgrade process

Solution: make sure that the advanced properties of disk C and its subfolders C:\ Program Files\ Microsoft SQL Server and C:\ Program Files (x86)\ Microsoft SQL Server are not checked to archive folders

After the application is confirmed, upgrade sql server2008 again, and then you can succeed.

At this point, you can connect to the database if a network-related or instance-specific error occurs when establishing a connection with SQL Server.

Solution: the first step, the program-- SQL Server2008-- configuration tool-- SQL Server configuration Manager, to find the MSSQLSERVER protocol in the SQL Server network configuration: enable the following protocol.

Step 2: right-click to enable all stopped services.

At this point, you can successfully connect to the database again.

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