To view or print a Microsoft Office 2007 file, on a PC without Microsoft Office 2007, just download the viewer from Microsoft. The viewer will allow you to view and print those files, and can even open password protected Word, Excel or PowerPoint files. However, you cannot edit those files.
Here are the download links:
Word Viewer 2007
Excel Viewer 2007
PowerPoint Viewer 2007

it’s a good tips. now I can open my friend’s password protected file. whahaa..
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