[Question] SQL Server installation failed

【Problem Description】 The SQL Server installer encountered the following error: error code 0x84B20001

 

【answer】

Possible reasons: 1. It was installed before and not uninstalled cleanly. 2. VS’s built-in express is affected. 3. Anti- virus software such as 360 is affected. You can close it and then install it (this is more likely) 4. If you want to install setup100.exe, you must Install setup.exe first. If you want to install setuppatch.exe, execute it in the command prompt window. 5. Try to install 64-bit sqlserver on 32-bit windows. If you can’t solve it, it is recommended to replace the operating system.