Sometimes we get the following error message although we remove the virtual directory from the IIS and create the same virtual directory with the same as the one we’ve been deleted recently.
“The alias ‘LM/W3SVC/1/ROOT/virtual_directory_name’ already exists.”
Solution:
Go to command prompt and type the following
C:\Inetpub\AdminScripts>cscript adsutil.vbs DELETE W3SVC/1/ROOT/virtual_directory_name
Done! That’s it.
Happy Reading ! 
