Problem:-
One of my friend was installing cluster SQL Server, installation was stopped in the middle of something and he was not able to remove the SQL Server from add/remove programs or SQL Server setup. He has deleted the registry, folder manually but still he can see the SQL Server Services in Services.msc. He called me for the issue, I have provided him the below solution and it will work.
Solution:
1) Go to command prompt and use SC command to delete service
sc delete sqlserveragent
sc delete mssqlserver
2) You have to also delete the services registry entry using regedit
HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services
