Similar to post http://www.aspose.com/community/forums/thread/118942/another-question-about-datautil.forcedownload.aspx, it needs to change the setting of windows.
Try open the windows explorer, on the Tools menu -> Folder Options -> FileTypes, find doc in the list and click Advanced, make sure the checkbox before "Comfirm open after download" was selected.
Dean Deng
Lead Developer
Aspose Guangzhou Team
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