self created Hyperlinks in Excel

Hi,

I have a problem with hyperlinks in an Excel document. The document itsself shall not contain any hyperlinks. In only one sheet of the document hyperlinks create themselfs at certain points in time (I couldn’t identify a pattern yet). The links always lead to one position within the document and appear in empty cells, filled cells -> any cell. So this is not content dependent.

When I start to delete the 2500 hyperlinks !!! my VBA script crashes after about 15 deletions. Could the reason for this behaviour be a virus ? Any ideas why the links create itself ? Any help would be great !

System: WinXP, Excel 2002

Cheers, Florian