http://www.tiffviewer.com/tiff-viewers.htm

Barbara,

Nice to see you again. I know very little about tiff files, but don't know need a reader just like any other document format? Maybe you had a tiff file reader, and it got uninstalled or a file became corrupted. I'm not sure. The link above has a list of tiff file readers. I could be completely off base.

Bert
Pediatrics
Brewer, Maine