Start-to-All Programs-->microsoft SQL Server 2008--> Configuration Tool-->sql Server Installation Center--maintenance-and version upgrades, followed by prompts to continue to the next step, Enter the development version to the product Key: Pttfm-x467g-p7rh2-3q6cg-4dmyb Enterprise Edition: JD8Y6-HQG69-P9H84-XDTPG-34MBB If the above operation also prompts the evaluation period has been over, modify the registry: Hkey_local_ The "Commonfiles" value in Machine\software\microsoft\microsoft SQL server\100\configurationstate is changed to 3, and the above operation is re-executed. SQL Server 2008 installation requires a workaround that is always restarted: start-up and run-->regedit find hkey_local_machine\system\currentcontrolset\control\ Session Manager Location then right-click PendingFileRenameOperations in the right window, select Delete, then confirm
SQL Server 2008 evaluation period expired workaround
