However, English versions of Word run in the Macintosh, in DOS, in Windows, in Windows 95, and Windows NT, so this virus can infect on all of these platforms. Macro viruses are always application-specific. A macro virus consists of a set of macros, nothing more. The macros must be stored wherever the application stores macros. In the case of Word, macros are stored in templates, rather than documents.
Word treats any file with the .DOT extension as a template, and any other extension as a document.
And such a template can be stored with any extension. So macro viruses for Word typically arrive at a computer as a template file with the .DOC extension. Others convert documents to templates with the .DOC extension, so that these files themselves are infected. No boot or file virus has ever spread so rapidly. The number of different macro viruses is increasing rapidly.