I have had one problem like this were I downloaded a file that was .iso.exe I simply deleted the .exe part of the extension, then double-clicked on it and let the burner software do the rest. Maybe try that and see what happens. If it burns ok, there is a program (don't remember the name, sorry) that I used as a XP beta tester tha verifies the integrity of the XP burn and tells whether it will work or not. But first, just try delelting the extra extension. Hope that helps