Windows search 8.1 not finding XLS content

Anyone else having trouble with this, I've tried re-indexing, some of the XLS sheets are found, but not many, so I know the directories are included. Pretty sure it was all good on v8. I've switched the Bing search off, and if I let it search everywhere after a bit it gives up and says it's taking too long. It finds files based on the file name and seems to be fairly successful searching PDFs but XLS no good. I'm running Office 2003 so whether it's forgotten how to read old app stuff I don't know

Cheers

Check under the indexing options (control panel) and then advanced settings that the xls file type has not been unchecked under file types
Also if I'm not mistaken, the indexing by default does not index the entire C:\ or whatever so you may need to specify more areas if you do not leave your documents in one place

I've already added the location where the sheets are and as I said it finds a few and most of the PDFs etc in these locations so I' fairly confident its set right
Cheers