I lost a spreadsheet when my PC crashed and I had to re format the hardrive,
fotunately I had a back up of the file on a disc but when I try to open it I
get the message "the file is not in a recognisable format" I have only ever
used excel so at a loss what to try next. I have gone into the properties of
the file and it says "Microsoft excel worksheet"

Recovery of this file would save me a few hours work so any help would be
appreciated.
thanks