How to delete sqlserver if the installation fails?

If the SQL Server installation fails, you can clean it up by following these steps: Uninstall SQL Server Delete registry keys Delete files and folders Restart the computer

Cleaning steps after SQL Server installation fails

If SQL Server installation fails, the following steps can help you cleanly delete all installed files:

1 . Uninstall SQL Server

• Open "Control Panel" > "Programs and Features".
• Find "Microsoft SQL Server xx" in the list of installed programs (where "xx" is the version of SQL Server).
• Select it and click "Uninstall".
• Follow the uninstall wizard to complete the uninstall process.

2. Delete the registry key

• Press the Windows key R to open the Run box.
• Enter "regedit" and press Enter to open the Registry Editor.

• Navigate to the following registry key:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQL Server
  • ##HKEY_LOCAL_MACHINE\ SOFTWARE\Microsoft\Windows NT\CurrentVersion\Uninstall\{26759A48-1799-4911-8D5E-D438D6B43665}
Delete these two registry keys.

3. Delete files and folders

• Navigate to the following folder and delete it:
  • C:\Program Files\Microsoft SQL Server
  • C:\Program Files (x86)\Microsoft SQL Server
  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files
  • C:\Windows\Temp

4. Restart the computer

After the uninstallation is complete, restart the computer to ensure that all changes take effect.

Tips:

Before performing the uninstall steps, please make sure you have backed up all important data.
• If you encounter any problems during the uninstallation process, please contact Microsoft Support or use the uninstall troubleshooter tool.
• Before reinstalling SQL Server, make sure your system meets the minimum system requirements.

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