>>>I am using Windows 10.
>>>
>>>I need to compare 2 files. They are in TFS but in different branches.
>>>
>>>I did a quick search locally for Beyond Compare or WinDiff but both searches came with links to Download, so I don't have anything installed locally, I think.
>>>
>>>Do you have advice for me as what to use to compare the versions?
>>
>>I use online tools for that. Here is one: https://www.diffnow.com
>
>Thanks. My files were very big and it shows 'No difference'. I am not sure I can trust 100% to this.
>
>In any case, this is very helpful.

If you just want to know whether or not two files are identical, you can use the CMD-line FC (File Compare) utility:

* In a CMD window:
fc first-file.abc second-file.xyz
* If they identical you will get the message "No differences encountered"