TIFF file not opening in Office 2007

You  have to install Microsoft Office Document Imaging.

To install Microsoft Office Document Imaging in Windows Vista, follow these steps:

1. Click Start, type Programs and Features in the Start Search box, and then click Programs and Features in the Programs list.
2. Click the 2007 Microsoft Office suite that you are running, and then click Change. For example, click Microsoft Office Premium 2007, and then click Change.
3. Click Add or Remove Features, and then click Continue.
4. Expand Office Tools, and then click Microsoft Office Document Imaging.
5. Click Run all from My Computer, and then click Continue.
6. Click Close to exit the 2007 Microsoft Office suite setup.

To install Microsoft Office Document Imaging in Microsoft Windows XP, follow these steps:

1. Click Start, type appwiz.cpl in the Start Search box, and then press ENTER.
2. Click the 2007 Microsoft Office suite that you are running, and then click Change. For example, click Microsoft Office Premium 2007, and then click Change.
3. Click Add or Remove Features, and then click Continue.
4. Expand Office Tools, and then click Microsoft Office Document Imaging.
5. Click Run all from My Computer, and then click Continue.
6. Click Close to exit the 2007 Microsoft Office suite setup.