Tested on Windows 7, and works in same way as on any other windows OS.
You do not need MS Excel or any other software that opens MS Excel files in order to use Compare Sheets.
You can review comparision result by opening file in Compare Sheets and selecting sheet containing result
How to prepare tables for use with compare sheets:
RELATED TOPICScompare Compare Sheets creat Data Compare Download Compare Sheets Excel files MS Excel Sheets workbook