Check file hashes, the safer way. Especially because it's open source.
You will need python for this. To install python, go to https://www.python.org/downloads and download it.
So, when you get python, run the application HashViewer.py
That's it for installation!
When you launch it, you will see a prompt if you want to change the directory or not.
So. If the file is not located in the same folder as the python file, then you can just input it's directory in there.
Example: C:\Users\mike\Desktop\Folder
Then, you'll have to input the filename of the file, so it can scan it for the hash of it.
Example: docs.txt
Then, you'll see 3 weird spam stuff. They are the hashes of the file! The order of them is: SHA1, SHA256, MD5.