So I have this homelab running and in it, has a bunch of NAS and compute machines for AI research (64GB, 32 cores, 16 VMs, etc.) My travel laptop cannot possibly even compare to the robustness of my homelab which is also clustered so yeah, but my issued laptop cannot install client software but I can use Windows built in VPN to connect to my home? Any suggestions on what I can put on my Pi that I can connect with windows built-in VPN tool? I wish i can download wireguard, OpenVPN, but I have to stick with built-ins. Also it must be on a Pi because I will port forward the Pi port, i dont want to port forward the important machines. Cant port forward VMs either as my provider, xfinity, can only port forward physical devices 
Edit: open source software is preferrable