When I saved a text file using a notepad with ANSI, I lost all of the information since it became all question marks. Is there a way to convert it back to Unicode to retrieve the text?
Once the characters are converted to
? marks they cannot be converted back:
? mark is just a
? mark, it doesn't know where it came from.
If you replace all the letters a, b, c in a text with x,
you cannot restore the original a, b, c letters.
Your only option is to recover from a previous copy if you have one.
You can try to open your text document in notepad++. As commented by @cartographerGo to encoding menu and chose Encode in UTF-8 option.
It may help you to retrieve your text back.
Or you can try with all options, may some encoding format convert your text to origional one . :)
If you write a text document in UTF-8, you must save it as UTF-8 otherwise this happens.
So no, you have to restart whatever you did.