Can I just download Writer and Calc?

Wrier and Calc is all I need

If you using Linux - Go to the Software Center Search for Libreoffice and install Writer and Calc.

I am using Windows 10

Partially:
Here is why/how: https://ask.libreoffice.org/en/question/2464/singular-download-question/?answer=4170#post-id-4170

Since the question was asked back in 2012 the option to install individual modules is no longer available in newer versions.