I was working on an Microsoft Excel 2010 document when all of a sudden my computer either crashed or rebooted I'm not sure exactly all I know is when it finally turned back on my document last auto save was from one month ago and I lost everything in between. Is there any other recovery utility I could use, I don't understand why the autosave is so old. I do not have a system restore point.
As a last resort you might check in
Otherwise there is no possible way to recover a file that was never saved to a physical drive.
As for the future you might try this:
Better yet hit Ctrl+S frequently and you won't have to rely on autosaves.