Every time your Windows 11 computer connects to a website, a cloud service, or even a local network resource, it may pause for several seconds before the request actually leaves your network. This delay is often caused by the Auto Proxy Detection feature, which forces Windows to search for a proxy configuration file on the local network before every connection attempt. The feature is enabled by default in Windows 11 and can affect all applications that use the WinHTTP or WinINET stack, including web browsers, Microsoft 365 apps, and system updates. This article explains the technical reason for the slowdown, shows you how to disable the feature, and describes related performance issues you may encounter.
Key Takeaways: Auto Proxy Detection and Network Delays in Windows 11
- Settings > Network & internet > Proxy > Automatically detect settings Off: Disables the automatic Web Proxy Auto-Discovery Protocol scan that causes delays.
- Internet Options > Connections > LAN settings > Automatically detect settings unchecked: Alternate method to turn off the feature for legacy WinINET applications.
- netsh winhttp set proxy proxy-server=”” bypass-list=”
“: Command-line fix to clear WinHTTP proxy settings and bypass local addresses.
Why Auto Proxy Detection Causes Network Delays in Windows 11
Auto Proxy Detection relies on the Web Proxy Auto-Discovery Protocol, or WPAD. When enabled, Windows 11 sends a DHCPINFORM message to the DHCP server and a DNS query for a host named wpad on the local domain. The goal is to locate a file named wpad.dat that contains proxy configuration instructions. This process happens on every outbound HTTP or HTTPS request made through WinHTTP or WinINET, not just once at system startup.
The delay occurs because the DHCP and DNS queries must time out if no WPAD server exists on the network. In a typical home or small business environment without a dedicated proxy server, the DHCP request for option 252 returns nothing, and the DNS lookup for wpad.localdomain fails. Each timeout takes between 1 and 3 seconds. For a single web page that loads 50 resources, this adds up to 50 to 150 seconds of unnecessary waiting.
Even when a WPAD server exists, the download of the wpad.dat file adds latency. Windows 11 caches the file, but the initial detection probe still occurs on every new application instance or after network changes. The cumulative effect is most noticeable in fast network environments where the actual data transfer time is far shorter than the proxy detection delay.
Steps to Disable Auto Proxy Detection in Windows 11
You can turn off Auto Proxy Detection using the Settings app, the legacy Internet Options panel, or the command line. Choose the method that matches your environment. All three methods achieve the same result.
Method 1: Using the Settings App
- Open Windows 11 Settings
Press the Windows key and type Settings. Press Enter to open the app. - Navigate to Network & internet > Proxy
In the left pane, click Network & internet. Then click Proxy in the right pane. - Disable automatic proxy detection
Under the Automatic proxy setup section, toggle the switch for Automatically detect settings to Off.
Method 2: Using the Legacy Internet Options Panel
- Open Internet Options
Press the Windows key, type Internet Options, and press Enter. Alternatively, open Control Panel, then click Internet Options. - Open LAN settings
In the Internet Properties dialog, click the Connections tab. Then click the LAN settings button. - Uncheck automatic detection
In the Local Area Network LAN Settings dialog, uncheck the box labeled Automatically detect settings. Click OK and then OK again to close the properties dialog.
Method 3: Using Command Prompt or PowerShell
- Open an elevated command prompt
Press the Windows key, type cmd, right-click Command Prompt, and select Run as administrator. Click Yes in the User Account Control prompt. - Clear WinHTTP proxy settings
Type the following command and press Enter:netsh winhttp reset proxy
This command removes any configured proxy and disables proxy detection for WinHTTP-based applications. - Set a bypass list for local addresses
To ensure local traffic is not affected, type:netsh winhttp set proxy proxy-server="" bypass-list="<local>"
This sets an empty proxy server with a bypass rule for local addresses.
Common Issues After Disabling Auto Proxy Detection
Some corporate apps stop connecting to the internet
In enterprise environments where a proxy server is required, disabling automatic detection breaks connectivity for apps that use WinHTTP, such as Microsoft 365 updates or Windows Update. To fix this, you must manually configure the proxy address. Go to Settings > Network & internet > Proxy and under Manual proxy setup, turn on Use a proxy server. Enter the proxy server IP address and port number provided by your IT department.
Web browsers still show slow loading after the change
Some browsers like Google Chrome and Mozilla Firefox maintain their own proxy settings independent of Windows. Check the browser’s network or proxy settings. In Chrome, go to Settings > System > Open your computer’s proxy settings. This opens the Windows proxy settings again. In Firefox, go to Settings > Network Settings and select No proxy.
Performance returns after a reboot but slows down again later
Group Policy or third-party security software may re-enable Auto Proxy Detection after a restart. To verify, open a command prompt and run netsh winhttp show proxy. If the output shows a proxy server or the WPAD flag, a policy is overriding your settings. Contact your IT administrator to modify the Group Policy object that controls proxy settings.
Auto Proxy Detection vs Manual Proxy Configuration: Network Request Behavior
| Item | Auto Proxy Detection On | Auto Proxy Detection Off |
|---|---|---|
| Description | Windows probes DHCP and DNS on every request to find a proxy | Windows uses no proxy or a manually specified proxy without probing |
| Latency per request | 1 to 3 seconds added | 0 seconds added |
| Best for | Large corporate networks with a dedicated WPAD server | Home networks, small offices, or networks without a proxy |
| Configuration effort | None required | Must disable or set a manual proxy address |
| Risk | WPAD spoofing attacks possible on untrusted networks | No proxy discovery security risk |
You can now identify and disable the Auto Proxy Detection feature in Windows 11 to eliminate unnecessary network delays. Start by checking whether your network requires a proxy at all. If it does, configure the proxy manually using the Settings app or the netsh winhttp command. For advanced users, consider adding the bypass list for local addresses to prevent WinHTTP from attempting proxy detection even after a network change. This approach keeps your outbound requests fast and your connection secure.