I received a few forwarded emails from my dad lately that have had video attachments. When I click on the email and error pops up and then the email makes copies of itself in the inbox until I just turn the PC off. It just started doing this recently and only with video attachments. If I go into safe mode I can go into Outlook 2007 and delete the messages. But when I get them in normal XP mode, it still does the same thing.

Note: Other people who have got the forward don't have this problem. Some are using Outlook 2007. Also, when I access my email via the internet (not outlook), I can view the messages properly.

And.... How can I backup all my settings and email from Outlook 2007? If I lost Outlook would I lose any emails?

Windows XP Pro SP3
Outlook 2007 (part of office 2007)