I tried this solution (uncheck ignore other DDEs) to no avail.
Also tried going to Add/Change Programs- change Office - Make Excel not available - reboot - and changed Excel to run.
I can open the file thru excel - open or choosing the file from the recent list
But with Explorer, can't double click or right click "Open"
but if I choose "open with", I get all the worksheets!
I checked always use this program for this type of file but it did not resolve the issue.
Coincidentally (or not) I just upgraded to Spy Bot 2.06 Beta and ran it - also ran the AVG virus scanner and removed something called TR/Crypt.CFI.Gen.