Hi @Sharaha Nallasivam ,
The error message "The system cannot find the path specified" showed that there are some files of SQL Server basic component couldn't be located. It is possible that these files are corrupted or the access for these files is denied.
Please follow the steps from the blog Cleanly Uninstalling Stubborn SQL Server Components to uninstall SQL server, then reinstall SQL 2019 Express.
Download SQL server 2019 setup file from MS download link again. Then running the SQL Server installation media as administrator. When you reinstalling the SQL Server, on server configuration page, please change the SQL Server Database Engine account and SQL Server Agent account to local System(NT AUTHORITY\SYSTEM) to ensure these accounts have enough permission.
If this is still not work, please check your SQL server setup log. Detail.txt is usually the best file to dig into. The files are very verbose, but if you are lucky may you be able to figure out which file that is missing.
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