SharePoint Portal Server cannot be deleted

The Administrator guide says:
To completely delete the SharePoint Portal Server, you must delete the following in the following order:Program:
SharePoint Portal Server
Windows SharePoint Services
SQL Server Desktop Engine (if installed)

The previous day, the SQL Server Desktop Engine was accidentally deleted, Windows SharePoint Services was deleted, and a fatal error was reported when the SharePoint Portal Server was deleted or fixed. Deleting the registry is still invalid.

The SharePoint Portal Server cannot be deleted, used, or installed. Do you want to reinstall the system? In fact, reinstalling the system is the biggest disaster. I have to install a computer from the morning till the evening.

The final solution is as follows:
Use the Windows optimization master to forcibly Delete the SharePoint Portal Server, and then install the SharePoint Portal Server. Now it can be installed, but an error is prompted during the installation process. Ignore this error.
After the installation is successful, delete the SharePoint Portal Server in the Add/delete program. Now you can successfully delete it, and then execute the installation process. Now you can install it smoothly, create a portal, and OK ....