WinHTTP 5.1 is now a component in the following operating systems:
- Windows Server 2003 family.
- Windows XP, Service Pack 1.
- Windows 2000, Service Pack 3 (except Datacenter Server)
- Certificate Configuration Tool (WinHttpCertCfg.exe).
- Trace Configuration Tool (WinHttpTraceCfg.exe).
WinHTTP 5.1 also includes a proxy configuration tool, Proxycfg.exe. Proxycfg.exe is included with Windows Server 2003. See
For additional information, See:
NOTE: If you install WinHTTP 5.0 and WinHTTP 5.1 on the same computer, you can also use WinHTTP 5.0 tools with WinHTTP 5.1.