How to uninstall SCSM Web Portal from the server where SCSM Management Server is installed

I ended up installing SCSM and Web Portal on the same server and the Web Portal broke. This is the documented procedure to uninstall broken Web Portal from a server.

Disclaimer: These are the steps I have performed and successfully uninstalled web portal and re-installed. I am not sure whether all the steps are mandatory and required. Probably only step 4 may be required.

Before you read any further, Microsoft supported method of uninstalling Web Portal from the same server where the SCSM management server is installed is a complete uninstall of the SCSM product.
This can be accomplished using two methods:

1) run setup.exe /uninstall - If this does not work then,
2) rum msiexec /x \\...<folder where SCSM install media is kept>\ServiceManager\amd64\Setup\Server\sm.msi

1.   Open Regedit
   a. Go to HKLM\Software\Microsoft\windows\CurrentVersion\Installer
   b. Search for "Service Manager Portal"
   c. Delete All references

2. Next go to HKLM\Software\Microsoft\System Center\2010\Service Manager\setup and delete all references to Portal

3. Next go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\223333EF9E9130B42B84BD23D7699AA2\Features and delete SMPortal

4. Open SQL management Studio and delete/rename the Sharepoint_SMPortalContent database

5. Last but not the least, rename <Drive where IIS is installed>\inetpub\wwwroot and rename the System Center Service Manager Portal to – Service Manager - Old

 6. Once you initiate the Setup.exe, you can select Web Portal and it will work just fine.