If your Excel files are opening in Notepad on Windows PC, here's how you can reset the settings to make .xls, .xlsx, etc files open in Excel.

Once you do so, Excel files will become noticeable to the operating system again and you should make the file-to-program association once again to confirm the setting.

Learn how to open & view exported .TSV files on Windows PC using Excel. You can also use free TSV file viewer software or online tools.

When you launch Excel, it opens a single window on the Windows desktop. When you open or create another workbook (an Excel file that can contain one or more worksheets), that opens an internal ...

Microsoft Word can accommodate a surprising number of file formats, and even take in Excel and PowerPoint data, though it might look funny. Here's how.