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I wanted to learn SQL to create my own database to serve for my future project but things seem not to be smooth as expected from the first step. I struggled with installing the SQL Server for days with different times of uninstalling and reinstalling. The installation Progress has just constantly thrown me warning window with the content was:
The MOF compiler could not connect with the WMI server. This is either because of a semantic error such as an incompatibility with the existing WMI repository or an actual error such as the failure of the WMI server to start.
I believed that the old SQL Server was completely uninstalled by deleting any related thing including files in Program Files, Program Files(x86), and its registry.
I searched and followed many threads with the same issue on some forums but still got no result.
After skipping that warning by canceling it, the installation completed with failure shown in the picture below. Your help would be much appreciated. Here is the log file: 54662-log.txt
Can you please also add the output of C:\Program Files\Microsoft SQL Server\150\Setup Bootstrap\Log\20210107_224816\sql_engine_core_inst_Cpu64_1.log in the question. This log file would have detailed information about what caused this issue. With prior experience such issues come when remnants of previous failed installation is present. Please uninstall completely and run the setup again as administrator
No what you have posted is summary file. You need to go to location I have shared above and attach that file. If uninstall is fine dont delete anything
Thank you, guys. I really appreciated your concern about my problem. Finally, I managed to install the SQL Server by uninstalling Visual Studio and reinstall it, and remember replacing the instance name with another one at the first configuration. I don't know which one of the two above steps causes this error so it's better to do both if anyone has a similar issue.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 78%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECZ%3C/text%3E%3C/svg%3E)
Hi @Student Strange ,
Try to download a new SQL Server 2019 Express installation file from the official site.
Then right click the SETUP.exe(run as administrator), please try to install only Database Engine Services , and not install the R and others features this time.
If the installation is successful, then continue to install R and others.
Hope you have local admin permission on your system. Also you are not having any failed installation instance of older SQL Version.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(22.400000000000002, 14.000000000000002%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKA%3C/text%3E%3C/svg%3E)
Move the iso installation file to your local machine before starting the installation