I installed Windows 10 2 days ago. I am using Excel, sometimes with 3 files open at once. If I switch over to a another program, I cannot get back to my Excel files. I have tried clicking the Excel icon in the Taskbar and then clicking the files, using File Explorer, Alt Tab, etc.. and cannot get to the files! I just keep getting the Desktop or the last app I was using. I eventually have to close Excel....then use another laptop to get my job done.

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Can anyone help?