I've been getting this error message in my event viewer almost from last one month every night arround 1:00 am. I am running office 2003 with service pack 2.
Faulting application winword.exe, version 11.0.6568.0, stamp 42e178a5, faulting module mso.dll, version 11.0.6568.0, stamp 42e18ef6, debug? 0, fault address 0x0003446c.
Now you need to patch your Office 2003. Have you heard about the vulnerability of word 2003 ? . You are sure hit by a trojan which uses this vulnerability. Better Hurry up patching man !!!!!!!!!!!!!