A common problem when using Microsoft Outlook
Express Version 6 is to try and open an attachment in an email, but find
that it is greyed out and you can't open the attachment.
This is caused by Microsoft making the default selection within the virus protection section of Outlook Express version 6:
"Do not allow attachments to be saved or opened that could potentially be a virus."
In fact, all Outlook Express does is prevent access to certain types of
file which can contain viruses. It does not actually look inside the
file and attempt to determine whether there really is a virus. So if you
are expecting the attachment and simply want to open it, you can change
this behaviour and open the attachment normally.
In order to change this setting you must run Outlook Express Version 6,
then select Tools > Options then select the Security tab, you will
find that "Do not allow attachments to be saved or opened that could
potentially be a virus." is ticked. Unselect it, and click OK.
You should now be able to open attachments that you receive via email.