There is a folder within a project that you don't want to be tracked with git, to do this on a windows computer:
1. In the project folder managed by git, make a new file named '.gitignore.' (no quotes, but with periods at both ends -- it will automatically be changed to '.gitignore'
2. Add this bit of text '/foldertoignore/*' (again, no quotes)
3. Save the file
All files within that folder should no longer be part of the git project.