Unable to send email from Word or Pictures

In Word and/or My Pictures, when i click on Send To and Email, I get a page
"Enter Product Key." When I enter the Product Key for MS Word 2007 I get an
error, invalid Product Key. The email will not "Send." Any suggestions?
Thanks!

Sounds like Windows Mail doesn't have all its defaults.
Open the Default Programs applet, which you can access either from
the Start menu or via the Control Panel, then click the first item:
"Set your default programs."
After a few seconds, a list of programs comes up. Click on "Windows
Mail". If it doesn't respond with "This program has all its defaults"
then fix it by clicking on the option indicated by the first green arrow.

I did what you said and the response was Windows Mail has all of
it's defaults.

One more thing to try:
The following procedure will rewrite the default protocol
assignments in the registry:
Open the Default Programs applet, then click on "Set program
access and computer defaults." Expand the Custom selection, and
select Windows Mail. Click OK.