xls is Excel’s spreadsheet file format.

Excel is one of Microsoft's Office software.

Office office software also includes image and text processing Word, electronic slides PowerPoint, etc.

They have a function "macro" that can be programmed, which brings convenience but also brings risks. It is also the "macro virus" that was often heard in the past.

However, anti-virus software is now very strict about this. Therefore, it is very rare to hear of the emergence of "macro viruses".

And the security of Excel’s default macros is relatively high.

So: files with the XLS suffix can be opened with Excel with confidence.

If you are not worried, first open the Excel program (or open an empty xls file) and set the security of the macro. Steps: Excel → "Tools" menu → "Macros" → "Security" → " Security Level" is set to "High" or "Very High" → "OK". Then open your xls file.

Of course, you can also scan it with anti-virus software.

Happy use.

————Signature below————

The answer is hard work, but it is joy to know!