WinHTTP Web Proxy Auto-Discovery Service - Windows Vista Service
WinHTTP implements the client HTTP stack and provides developers with a Win32 API and COM Automation component for sending HTTP requests and receiving responses. In addition, WinHTTP provides support for auto-discovering a proxy configuration via its implementation of the Web Proxy Auto-Discovery (WPAD) protocol.
This service also exists in Windows 10, 11, 7 and 8.
Startup Type
| Windows Vista edition | without SP | SP1 | SP2 |
|---|---|---|---|
| Starter | Manual | Manual | Manual |
| Home Basic | Manual | Manual | Manual |
| Home Premium | Manual | Manual | Manual |
| Business | Manual | Manual | Manual |
| Ultimate | Manual | Manual | Manual |
Default Properties
| Display name: | WinHTTP Web Proxy Auto-Discovery Service |
| Service name: | WinHttpAutoProxySvc |
| Type: | share |
| Path: | %WinDir%\system32\svchost.exe -k LocalService |
| File: | winhttp.dll |
| Error control: | normal |
| Object: | NT AUTHORITY\LocalService |
| Privileges: |
|
Default Behavior
The WinHTTP Web Proxy Auto-Discovery Service starts as NT AUTHORITY\LocalService and runs in a shared process of svchost.exe. If WinHTTP Web Proxy Auto-Discovery Service fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the WinHttpAutoProxySvc service has failed to start.
Dependencies
WinHTTP Web Proxy Auto-Discovery Service will not start, if the DHCP Client is stopped or disabled.
Restore Default Startup Type of WinHTTP Web Proxy Auto-Discovery Service
Automated Restore
1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.
2. Save the RestoreWinHTTPWebProxyAutoDiscoveryServiceWindowsVista.bat file to any folder on your hard drive.
3. Right-click the downloaded batch file and select Run as administrator.
4. Restart the computer to save changes.
Note. Make sure that the winhttp.dll file exists in the folder. If this file is missing you can try to restore it from your Windows Vista installation media.