Remmina is default in Trisquel. Try this with RDP. Or install VNC on Windows and choose this in Remmina.
Access Trisquel from Windows with xrdp: https://www.youtube.com/watch?v=jbJ2tbXcHus
And access Windows from Trisquel with RDP in Remmina: https://www.youtube.com/watch?v=ZCyRBoZ_eGM --One tip: You can do the most or all with only free software if you want. You need to search and try the better solution for you.
