Recording Skype call in Windows & Linux
There are many free and paid software programs for windows that allow you to record Skype calls, but it can be hard to tell which ones can be trusted (some contain spyware or are very expensive).
This is why I would suggest using OBSProject. It is not specifically aimed at skype recording, but used mostly by gamers to record and stream themselves playing video games (this is quite popular nowadays). You can download it here.
Here is a video tutorial about recording Skype: