Some Windows users may encounter issues where the VPN shows as connected but the internet is inaccessible, or the VPN cannot connect at all. After investigation, LetsVPN engineers have found that these problems are usually caused by network enhancement services running in the Windows system.
These services are not essential Windows components. Disabling them does not affect your ability to connect to the internet. If you do not rely on these network optimization functions, we recommend disabling them to ensure VPN stability.
Network Services That Affect LetsVPN
Killer Network Service
What is it?
Found on some Dell, Alienware, Razer, MSI, Acer devices, Killer Network Service is bundled with network drivers to optimize bandwidth allocation. It prioritizes traffic based on application type.
Why does it affect VPN?
By default, it lowers VPN priority while boosting games and video apps, causing VPN data to be delayed—leading to connection failures or no internet access after connection.
SmartByte Network Service
What is it?
Preinstalled on many Dell laptops (e.g., Inspiron, XPS, Vostro), SmartByte attempts to "intelligently" allocate bandwidth for smoother video and conferencing experiences.
Why does it affect VPN?
It may deprioritize VPN traffic, resulting in slow or failed connections.
IntelConnect Related Services
What is it?
Includes Intel Connectivity Service, Network Service, and IntelConnect Service. These optimize connections in multi-network environments.
Why does it affect VPN?
They modify network routing or priorities, which may conflict with VPN tunneling logic and cause instability.
ExpressConnect Related Services
What is it?
Dell's premium bandwidth manager, built into Dell Optimizer, prioritizes conferencing or productivity apps on business laptops.
Why does it affect VPN?
It may lower VPN priority, disrupting encrypted tunnel creation and access.
Host Network Service
What is it?
Preinstalled service used for features like wireless display, hotspot sharing, and system-level coordination.
Why does it affect VPN?
It can block VPN ports or interfere with routes, leading to disconnections or unusable connections.
Clash Verge Service
What is it?
Clash Verge is a GUI-based Clash client used for advanced proxy configuration. It installs a background service called Clash Verge Service, which runs local proxy servers (e.g., port 7890) and sets system proxy rules.
Why does it affect VPN?
It may inject system-wide proxy rules that override VPN routing
How to Disable These Services
Step 1: Open Services Manager
Press Win + R, type `services.msc`, and hit Enter
Open Services Manager
Step 2: Locate These Services (you may only see some):
- Killer Network Service
- SmartByte Network Service
- Intel Connectivity Service
- Intel Connectivity Network Service
- IntelConnect Service
- ExpressConnect Network Service
- Host Network Service
- Clash Verge Service
Step 3: Disable Each One
Double-click → → Click "Apply" or "OK"
Set Startup Type to "Disabled"
Click "Stop"
Click "Apply" or "OK"
FAQ
Q: Will disabling these services break my system?
A: No, they are non-essential enhancements.
Q: Will it stop my internet?
A: No, Windows will use the default network path.
Q: Still can’t connect to VPN?
A: Please contact FastLink support via live chat for help.
Q: Service name doesn’t match exactly—disable it?
A: Confirm with support before proceeding.
Q: Can I re-enable later?
A: Yes, just set the service to "Automatic" and start it again.
Please don’t hesitate to contact us via online customer service in LetsVPN app or sending us an email at letsvpn@rbox.me. Our professional technical team will take immediate action to reply to you.