Excel 2010 Starts with a grey screen, won't open file

Excel won't open my file when I double-click on it. Excel opens,but just a blank grey screen and no error.

All tip's for inteet don't work. I don't have idea how to fix this problem... :( I want open .xls in office 2010, .xlsx work fine but .xls no only gray screen. I use temporary fix, open this files in OpenOffice and convert to .xlsx but it is irritating.

I think it is important information: I using windows 10

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