You are attempting to open a file type that has been blocked by your administrator.}For security reasons, your administrator ...

{You are attempting to open a file type that has been blocked by your administrator.}For security reasons, your administrator has set policy that prevents you from opening documents with this file type. It is possible that your administrator may have blocked one or more file types as a result of setting this policy. To avoid this error message, you need to have administrator rights so that you can change the policy setting to allow opening documents of this type.