there is a macro security setting in the options of excel (word maybe aswell?) high, medium or low.

*I think* The first time you open a document, you choose to enable or disable macros. It remembers this setting for each document. If you are opening a document which potentially could have a macrovirus imbeddded, disable them. Then open up the Visual BAsic editor (Alt F11) and check the code of the macros. *I think*

Hope this helps, Prankster