I Recently had a client that had problems with his Outlook opening attachments but could save them. Turns out his temp file was just overloaded with old temp files.
Visit How-To-Outlook for a great tool to help you and try and show some love by donating a few dollars for a great free program.
http://www.howto-outlook.com/products/outlooktempcleaner.htm
Contact a professional to help you:
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