Hello nn9314,
You'll need to have the Mac set up to accept remote access. The steps at Allow Apple Remote Desktop to access your Mac
- On your Mac, choose Apple menu > System Settings, click General in the sidebar, then click Sharing on the right. (You may need to scroll down.)
- Turn on Remote Management, then click the Info button on the right.
- If asked, select the tasks remote users are permitted to perform. If you’re not asked, click Options to select tasks.
- Do one of the following:
- Select “All users” to let anyone with a user account on your Mac share your screen.
- Select “Only these users,” click the Add button , then select the users who can share your Mac.
4. Click Computer Settings, select options for your Mac, then click OK.
5. If people connect using a VNC viewer, you need to set a password.
6. Click Done.
Then from the Windows side, you'd need to make use of a third-party viewer or direct IP connections. Microsoft can likely help you with that guidance.
Thanks for using Apple Support Communities!