Needless to say, read the included instructions carefully before pressing buttons. The reason lies in the FILE TYPE of all web pages. Web pages are TEXT files. Text files consist ONLY of ABC's and 123's. No special, weird-looking codes exist in text files.
Binary files DO contain special characters.
That was a corrupted binary file. Text files just have letters of the alphabet, numbers, and basic punctuation in them. ALL computers understand and can interpret text files. To write web pages, you need a text editor. Windows comes with one called, Notepad.