Windows2000/XP系で256MB以上のメモリを搭載している人にお勧めの設定です。
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Windows Registry Editor Version 5.00

[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionInternet Settings]
"MaxConnectionsPer1_0Server"=dword:00000010
"MaxConnectionsPerServer"=dword:00000010

[HKEY_USERS.DEFAULTSoftwareMicrosoftWindowsCurrentVersionInternet Settings]
"MaxConnectionsPer1_0Server"=dword:00000010
"MaxConnectionsPerServer"=dword:00000010

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesAFDParameters]
"TransmitWorker"=dword:00000020

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParameters]
"DisableLargeSendOffload"=dword:00000000
"DisableTaskOffload"=dword:00000000
"MaxFreeTWTcbs"=dword:00100000
"MaxHashTableSize"=dword:00010000
"MaxSendSegments"=dword:00001000
"MaxUserPort"=dword:0000fffe
"NumTcbTablePartitions"=dword:00000040
"TcpTimedWaitDelay"=dword:0000003c
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ただし、DisableLargeSendOffloadとDisableTaskOffloadには、NICとの相性があります。