You probably get very upset when your Microsoft Office application crashes down (closes down unexpectedly) while you are working on something important. It is not necessarily that the problem is within the Microsoft Office code. Computer viruses (read How to Protect Yourself from Viruses from Your Computer Health Part Two), disk failures, or laziness with respect to installing updates (read How to Stay up to Date Automatically from Your Computer Health Part One) are just a few issues causing this condition.
Microsoft Office Diagnostic is a tool included in Microsoft Office 2007 pack, allowing you to run a series of diagnostic tests that can help you discover why your computer is crashing. These tests will either solve problems directly or may help you with the ways to solve them.
These are the diagnostics that are run:

Setup Diagnostic – Files and registry are checked for errors occurring due to viruses or by hardware that is faulty or incorrectly configured. While running for about 15 minutes, the test may require the original installation source.
Disk Diagnostic – Hard disk is examined for errors logged by the Windows system and SMART (Self-Monitoring, Analysis and Reporting Technology) feature of your hard disk (if provided by disk drive manufacturers) to notice potential hard disk failure.
Memory Diagnostic – Random Access Memory (RAM) is verified for integrity.
Update Diagnostic – Your computer is tested as to whether it has the latest updates installed to make Microsoft Office more stable. You can install updates from Microsoft Office Online.
Compatibility Diagnostic – Different versions of Microsoft Office are checked for conflicts, as two different versions of Office installed on your computer can cause instability.
Check for Known Solutions – The crash report is tested and checked against the database of Microsoft’s crash cases for available solutions.
To find out how to run diagnostics, read How to Fix Errors Using Microsoft Office Diagnostics.
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