Solution 1:
If its IIS7+, remove and re-add the role.
Otherwise:
Follow this procedure from Microsoft on how to remove and reinstall IIS 5.0, 5.1 and 6.0
IIS get back default config
Solution 1:
If its IIS7+, remove and re-add the role.
Otherwise:
Follow this procedure from Microsoft on how to remove and reinstall IIS 5.0, 5.1 and 6.0