Vista裡的Windows Mail無法直接開啟附件解決辦法

Vista裡的Windows Mail會出現無法直接開啟附件的狀況(如.doc or .pdf or .ppt)
可是存到桌面在開啟卻可以正常開啟....

解法:

doc http://www.winhelponline.com/articles/232/1/Unable-to-open-DOC-attachments-from-Windows-Mail.html
pdf http://www.winhelponline.com/articles/236/1/Unable-to-open-PDF-attachments-from-Windows-Mail.html
ppt http://www.winhelponline.com/articles/149/1/Unable-to-open-PPS-attachments-directly-from-Windows-Mail-in-Windows-Vista.html