Hi @Ayan ，
If you can share your error log, you will get more information about the error, it is located at:\Program Files\Microsoft SQL Server\MSSQLV.SQLEXPRESS\MSSQL\Log\ERRORLOG
For this error, you can check the file name of the setup exe first, if it is ssms.exe, please rename it to anything else
And remember close any open instances of SSMS and install again
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