Sophos authentication error: need to be fixed

When I navigated within the IIS MMC snap – in to Default – Web Site I got the following authentication error message.
How can I fix this error?

Authentication
There was an error while performing this operation
Details:
Filename:\?C:Program Files (x86)SophosSafegaurd
EnterpriseSGNSRVweb.config
Line number: 79
Error: This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault= “Deny”), or set explicitly by a location tag with overrideMode = “deny” or the legacy
allowOverride=”false”.
