Word 2000 Macro Virus??

I am running win 2000 sp3 and I have Office 2000 with latest sp’s, when I open a new or old word document and type the word the and hit enter or space the word changes to GOTCHA!!!. I have uninstalled and reinstalled office and even tried using a different version, my guess is a macro virus, but I have used both Panda and Norton 2002 don’t find any infections. Any help would be great, Pete, (Lime Guy)