1.先下個Windows Install Clean Up，清理sql相關東西，要全部清理。

7. 開始——執行，輸入regedit進入登錄檔， [-HKEY_LOCAL_MACHINESOFTWAREMicrosoftMSSQLServer] [-HKEY_LOCAL_MACHINESOFTWAREMicrosoftMicrosoft SQL Server] [-HKEY_LOCAL_MACHINESOFTWAREMicrosoftSearch] [-HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSSQLSERVER] [-HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSSQLServerADHelper] [-HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesSQLSERVERAGENT] [-HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSFtpsvc] [-HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSSCNTRS] [-HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSSEARCH] [-HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSSGatherer] [-HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSSGTHRSVC] [-HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesmssindex] 刪除以上檔案。

8.用最佳化工具最佳化一下注冊表，如最佳化大師。

9.重啟後重裝sql.