How about custom macros that try to close their own workbook? Maybe a custom toolbar that is designed to close the opened workbook?

The memory address you specified indicates that you may have a generic/text only printer installed. This has been known to create an error memory address similar to the one you mentioned. I would check this out.

If any of these sound familiar, then post back and I might be able to post you instructions on how to repair it.

I have a feeling the I might be insulting your intellegence a little. Do you work at a help desk or IT dept.?