1. Download Happ

Happ is our recommended client for Windows. It is built on the Xray core and supports VLESS + REALITY.

Download options:

After downloading, open the .exe file.

Happ download page showing Windows download button

2. Install the app

  1. Double-click setup-Happ.x64.exe
  2. If Windows Defender shows a warning, click More info → Run anyway
  3. Follow the setup wizard
  4. The installer will set up the required network drivers automatically

You may need to restart your computer after installation.

Windows Defender SmartScreen with Run anyway button

3. Add your subscription

  1. Open Happ from your desktop or Start menu
  2. Click Settings (gear icon) in the top right
  3. Go to the Subscription tab
  4. Click Add from URL
  5. Paste your SericaVPN subscription link (copy it from your dashboard)
  6. Click Add, then click Update

The app will fetch your server list. This may take a few seconds.

Happ subscription settings with Add from URL button

4. Connect

  1. Return to the main screen
  2. Pick a server region from the list (the app shows latency next to each server)
  3. Click the large Connect button in the center
  4. Wait for the status to change to Connected

You are now protected. The app runs in the background and reconnects automatically if your network changes.

Happ main screen showing Connect button and server list

1. Download v2RayTun

v2RayTun is an alternative client with a lightweight interface.

Download options:

After downloading, open the .exe file.

v2RayTun download page

2. Install the app

  1. Double-click v2RayTun_Setup.exe
  2. If Windows asks for permission, click Yes
  3. Follow the setup wizard
  4. Click Finish when done
Windows permission dialog for v2RayTun installer

3. Add your subscription

  1. Open v2RayTun
  2. Click Subscription at the top of the window
  3. Paste your SericaVPN subscription link (copy it from your dashboard)
  4. Click Update

The app will download your server list.

v2RayTun subscription settings

4. Connect

  1. Pick a server from the list on the left
  2. Click the Connect button at the bottom
  3. Wait for the connection status to turn green

You are now protected.

v2RayTun main screen with Connect button

Troubleshooting

  • “App wont open”: Right-click the app and choose Run as administrator
  • “No internet after connecting”: Try a different server from the list, or restart the app
  • “Subscription not loading”: Check that your subscription link is still active in your dashboard. Links expire if your account is inactive
  • “Windows Defender blocked it”: This is normal for VPN apps. Click More info then Run anyway
  • “TAP driver failed”: Re-run the installer as Administrator