All versions of Windows PCs come with a Remote Desktop Connection (RDP) pre-installed. There are several different implementations of the same protocol for Linux, in this example we will use xrdp

To install xrdp on a Raspberry Pi running Raspbian or Ubuntu use in the command line shell:

sudo apt-get install xrdp

xrdp will be installed as a service and will be started automatically.

On a Windows PC, launch Remote Desktop Connection, you must use MSTSC.exe to open a remote desktop connection to your RaspberryPi. You'll be prompted for a username and password. This will be the same information you've entered when you logged into your RaspberryPi to setup XRDP. 

If you use a Windows 10 PC: In the search box on the taskbar, type Remote Desktop Connection, and then select Remote Desktop Connection. In Remote Desktop Connection, type the full name or IP of the remote RaspberryPi , and select Connect.

To setup a static IP for your Raspberry Pi via an Ethernet cable, read the tutorial 

http://awesomeprojectsxyz.blogspot.it/2017/09/how-to-connect-your-raspberry-pi-to.html

If sometimes the audio stops working after Windows 7 has been running for a while then you should reboot PC or try this solution.

It is very simple! Open command line and write these commands:

net stop audiosrv
net stop AudioEndpointBuilder
net start audiosrv
net start AudioEndpointBuilder