Step 1: Turn on Remote Desktop in Windows

First, you need to tell Windows to allow other devices to see your screen.
Open your Windows Settings.
Go to System > Remote Desktop.
Toggle Enable Remote Desktop to On.

Step 2: Download and Run Docker

Docker handles the heavy lifting by setting up the server automatically with one command.
Go to docker(.)com and download the Windows installer.
Run the setup and install it.
Then open the Docker Desktop app so it's running in the background.

Step 3: Run the Server Command

Now we launch the Guacamole server application.
Open Command Prompt (type cmd in your Windows search bar).
Copy, paste, and run this exact command:
docker run -p 8080:8080 -d jwetzell/guacamole
3. Let the installation finish.

Step 4: Find Your PC's Local IP Address

Your Switch needs to know your PC's specific address on your home Wi-Fi network.
In that same Command Prompt window, type ipconfig and press Enter.
Look down the list for your main internet device (like Wireless LAN adapter Wi-Fi or Ethernet).
Find the line that says IPv4 Address (it will look like 192.168.1.XX).
Copy or write down this number.

Step 5: Configure the Connection Webpage

Now we log into the server on your PC and tell it where to send the video feed.
Open a web browser on your computer and go to: localhost(:)8080
Log in using the default details:

• Username: guacadmin
• Password: guacadmin

3. Click the user icon in the top right corner and click Settings.
4. Go to the Connections tab and click New Connection.
5. Set up your connection using these exact fields:

• Name: Give it any name you want (e.g., "My PC").
• Protocol: Switch the dropdown to RDP.

6. Scroll straight down to the Network section:

• Hostname: Paste your copied IPv4 Address here.
• Port: Type 3389.

7. Scroll down to the Authentication section:

• Username: Type your Windows PC sign-in username.
• Password: Type your Windows PC sign-in password.
• Ignore server certificate: Check this box.
• Trust host certificate on first use: Check this box.

8. Scroll to the very bottom and click Save.

Step 6: Connect and Control on Your Nintendo Switch

Time to jump on the console!
Open the hidden Switch browser.
In the Switch browser's URL/address bar, type your PC's IP address followed by :8080.
The Guacamole login page will load right on your Switch. Log in with guacadmin and guacadmin.
Tap on the new connection name you just created.
Boom, you are done! Your Windows desktop is now fully streaming to your Switch screen, and you can use the touch screen to move the mouse and control your entire computer.

If you have any kind of issues let me know and i'll try to help you!