Windows 7 Excel 2007 Loosing Focus

[styxjo]

I hope someone can help with an annoying problem.

While editing an Excel 2007 Spreadsheet with information from Yahoo Finance, the Excel window looses focus. This usually happens in the middle of editing a cell. I generally have only the IE - 10 window and the Excel window open when this happens. No other programs other than those started by Windows.

Any help is appreciated.