What should I do if the sql server installation fails (what should I do if the sql server cannot be installed)

Hello everyone, meet again, I'm your friend Quanstack Jun.

SQL Installation FAQ

1. The Windows update service is abnormal If the error shows that there is a problem with the Windows update service, it means that your computer may have closed the service.

Method 1: You can open it through the control panel, enter the [Control Panel], select [System and Security], click [Administrative Tools], double-click [Services], find "Windows update", click the right mouse button, and then click "Properties" in "Startup"Type" select "Auto".After installing the SQL server, it can be modified to disable;

Method 2: Shortcut [Ctrl+Alt+delete] to select and enter the task manager, find [Services] in the upper right corner, then open the service in the lower left corner, find Windows update, right-click and select Properties, and modify it in the startup type."Automatic" or "Disabled"

2. Unable to find one or more components, please reinstall the application

Find the SQL server installation program, double-click "setup" to enter the installation center, select Repair in [Maintenance], and click Next in turn. If you want to restart, you can only restart first, and SQL will be automatically stopped during the repair process.server service, the SQL server service will be automatically started after the repair is completed.

Delete SQL server completely

1. Uninstall a program Enter the control panel [Win key+R+Enter control+Enter], click [Programs] and then click [Programs and Features] to uninstall all programs with SQL server
2. Delete SQL files Find the SQL server files in the SQL installation disk (usually C disk) and delete all the SQL server files under the path of Program Files and Program Files (X86)
3. Delete the registry [Win+R+enter regedit] to enter the registry editor, and perform the following operations after entering (1) Completely delete the SQL server:

hkey_local_machine\software\Microsoft\MSSQLServer hkey_local_machine\software\Microsoft\Microsoft SQL Server hkey_current_user\software\Microsoft\Microsoft SQL Server hkey_current_user\software\Microsoft\Microsoft SQL Server hkey_local_machine\system\currentcontrolset\control\sessionmanager\pendingfilerenameoperations

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(2) Delete related information from the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer.

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSDTC.

Find the PendingFileRenameOperations project in the project to the right of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager and delete it.This will clear the installation pending items

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\setup remove ExceptionComponents

(3) Run the registry and delete the following items

HKEY_CURRENT_USER\Software\Microsoft\Microsoft SQL Server

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer

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