I just bought a new computer running Windows Vista Home Premium, and am trying to install my copy of Office Home & Student 2007. Once I validate my product code, etc., and everything starts installing, I get a popup window that says "Setup cannot find Excel.en-us\ExcelLR.cab. Browse to a valid installation source and then click ok." I can't find a valid installation source, and I'm at a bit of a loss with this. Help?