Unistall Sharepoint 3.0 Database MSSQL$MICROSOFT##SSEE

MSSQL$MICROSOFT##SSEE Database can be tricky to unistall, this happen when you unistall sharepoint 3.0 simply farm, and when you try to install again will say to you that SQL server is already install, to unistall you will have to make the following steps:

click "Start-Run" -> Regedit
go to folder
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
find the ID of the MSSQL$MICROSOFT##SSEE
Copy content of "uninstallstring"

Then
click "Start-Run" ex: C:\WINDOWS\system32\MsiExec.exe /I{90120000-1110-0000-0000-0000000FF1CE} CALLERID=OCSETUP.EXE
and the unistall window will show up
OR
MsiExec.exe /X{CEB5780F-1A70-44A9-850F-DE6C4F6AA8FB} callerid=ocsetup.exe