No, it won't work any more. You will need to download the Enhanced Version to be able to play it. But then, you REALLY want to have the enhanced version anyway. It fixed a lot of bugs and problems that people were having such as interminable load times between scenes. You can get it free if you have an account at GOG and enter your ID code. I have the original version too and they don't register it at the Witcher website any more.
Fireplace, yarn, knitting needles, books, wine... check. Yup, I'm ready for winter.