Specify the TCP/IP Receive Window Size (Windows 95/98/Me)

Registry Guide for Windows
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Registry tweaks, tricks & hacks to optimize, enhance and secure Microsoft Windows.

Specify the TCP/IP Receive Window Size (Windows 95/98/Me)
Category: Home > Network > Protocols > TCP-IP

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This setting controls the size of the TCP/IP receive Window. In general, larger receive windows work better with high-delay, high-bandwidth data.

For added efficiency, the receive window should also be an even multiple of the TCP Maximum Segment Size (MSS).

Open your registry and find the key below.

Create a new string value (or DWORD for Windows 95) called "DefaultRcvWindow" and set it to equal the required window size in bytes.

Restart Windows for the change to take effect.

Settings:

System Key: [HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP]
Name: DefaultRcvWindow
Type: REG_DWORD (DWORD Value)
Value: size in bytes (Default = 8192)

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.

Last Modified: April 12, 2002

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