If your using 2007 or 2010 try a Diagnostic:

I am having a problem with Word 2007, I am running Vista. I keep getting this error: AppHangB1. I have uninstalled the program and reinstalled, don. Corruption in MS Office can also generate errors. Another alternative way to fix ‘Excel not responding issue’ is Microsoft Office Repair. To do so, follow the below steps: Exit all current running MS Office programs. Click on Control Panel. Select Features and Programs option. Click Microsoft Office. Click on Repair Office option.

Running Microsoft Office Diagnostics from within Excel/Word

Click the Microsoft Office button
Click on the Excel/Word Options button to bring up the Excel Options dialog box (at the bottom of window)
Click on the Resources button in the left hand pane
Click on the Diagnose button in the right hand pane
Click Continue
Click Run Diagnostics

Running Microsoft Office Diagnostics from the Start Menu

Microsoft Word Error 0xc0000142

Click on the Start button
Click All Programs
Click Microsoft Office folder
Click Microsoft Office Tools
Click Microsoft Office Diagnostics
Click Continue
Click Run Diagnostics

You could also try starting in SAFE Mode:

Click START
click Run

Enter: excel /s

If you get an error message, you may have to use the complete path, something like:

C:Program FilesMicrosoft OfficeOfficeExcel.exe /s

Safe Mode forces Excel to bypass:

Microsoft Word Error Bookmark Not Defined

All files in any Excel startup folder.

Add-ins: The Addins dialog box still displays the
selected addins, but, the addins are not loaded.

Excel toolbars (Excel.xlb or <username>.xlb): The
original installation default toolbar settings are used.

Excel specific registry information: The original
installation default registry settings are used.

If this solves your problem, then the culprit resides somewhere in the above locations.

MIKE

http://www.skeptic.com/

Microsoft Word Error 1712

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Microsoft Word Error Apphangb1