McAfee is not compatible with Windows ME and I am not sure if there is any commercial antivirus programs out there that is either. I wish I had better news to share with you. Maybe someone who reads your post can recommend something that will get you by till you are able to get something newer as far as an operating system is concerned.
Paula, McAfee hasn't been compatible with Windows ME or 98 for several years now as those operating systems are obsolete and no longer supported by Microsoft.
Some other software may still be compatible but one would have do some research on that, sorry for the bad news.