The first thing you should do here is to close all programs that are using the Excel file you are attempting to open. Please ensure the .xls file is not opened in other workbooks, add-ins, or apps.

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.

If you're looking for an easy way to recover unsaved Excel files, this is the guide for you. We'll show you how to recover unsaved workbook quickly and easily, so you can get back to work.

Click "File," "Open" and browse to your second Excel file. Double-click the file to open it. Repeat the steps for each new file you'd like to open in its own window.

Excel users are reporting an odd bug in the way Excel 2010 and 2013 behave. In the past, XLS files produced by various packages (including Salesforce) could be opened by double-clicking on them ...

Excel gives you tons of options for editing, but what if your file is a PDF? Here's how to convert a PDF into an Excel file with ease. Just follow these steps.

If you frequently use Excel to create and edit spreadsheets on your Mac, you may want to access the same files while you’re on the go with just your iPad. Although Microsoft hasn’t released an ...