For many years I have been able to save Excel worksheets as a web page, and
when uploading onto my website, all Excel formatting was saved also.

For some reason yesterday, I tried to do the same thing, but all formatting
was lost when uploading the html file onto the website.

I have recently installed McAfee antivirus suite of programs, and it seems a
coincidence that this has happened all of a sudden.

As it is a commercial website, I am anxious to have the problem solved as
soon as possible.

Any help appreciated.