以系统管理员身分执行「命令提示字元」，於该视窗中，输入下面的指令，然後按下 Enter 键：
netsh int tcp set g a=d
: "关闭「接收窗口自动调整层级」，简单地说，就是把 7 好心提供的自动调整网路封包功能关闭，此功能的用意是增加档案传输的效率，减少传输所需的时间，但是因为有些网路设备（例如：网路卡、hub、router）不领情，所以会造成反效果。"
Receive Window Auto-Tuning（接收视窗自动调整层级）的参数选项：
本项共有五种参数可供选择设定：
1. 设为 Disabled
Disable the autotunning feature in Vista completely、and fit and lock the RWIN receive
window to default value 65,536 bytes.
输入：
netsh interface tcp set global autotuninglevel=disabled
2. 设为HighlyRestricted
Allow for the receive window to grow beyond the default value、but do so very conservatively.
In this mode、Vista will by default use RWIN of 16,384 bytes with a scale factor of 2.
输入：
netsh interface tcp set global autotuninglevel=highlyrestricted
3. 设为Restricted
Allow the receive window to grow beyond its default value、but limit such growth in
some scenarios.
输入：
netsh interface tcp set global autotuninglevel=restricted
4.设为 Normal （这是 7，Server 2008，及Vista的预设值）
Allow for the receive window to grow to accommodate almost all scenarios. The default
setting in Vista. Specifying this command mean you want to turn back on AutoTuning feature.
输入：
netsh interface tcp set global autotuninglevel=normal
5．设为Experimental
Allow for the receive window to grow to accommodate extreme scenarios. Note The
experimental value can decrease performance in common scenarios. This value should be
used only for research purposes.
输入：
netsh interface tcp set global autotuninglevel=experimental
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