Specify System-wide TCP Receive Window Size (Windows 2000/XP) Popular

The TcpWindowSize parameter can be used to set the receive window on a per-interface basis. This parameter can be used to set a global limit for the TCP window size on a system-wide basis.

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Open your registry and find or create the key below.

Create a new DWORD value, or modify the existing value, called "GlobalMaxTcpWindowSize" and set it according to the value data below.

Exit your registry; you may need to restart or log out of Windows for the change to take effect.

		(Default)	REG_SZ	(value not set)
		GlobalMaxTcpWindowSize	REG_DWORD	0x00007fff (32767)

	HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\P...

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Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.