How to Open an XLS File in Excel. XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save ...

There are a couple of ways to have Excel open most conveniently for you.

How to Open Excel Sheets in Separate Windows. Whether you use Microsoft Excel to help run your invoicing, sales tracking, returns or payment divisions, spreadsheet software may be a daily ...

While there is a way for you to open two Excel workbooks at the same time, you can also open multiple spreadsheets in separate windows. Learn how!

After the MS16-088 patch is applied, though, Excel refuses to open XLS files, showing a blank screen instead of a workbook. Poster conker123 on the TechNet Office forum described the problem ...

Don't manually re-enter data you find on the Web. Open Excel and transfer the data directly into a worksheet.

If the two Excel workbooks have the same name, you cannot open them at the same time. For this, either close one of them and then open the other or change the name of one of them.