Some tweaks for Windows XP

To disable the sending of unique player ID for Windows Media Player modify or create the following value:

[HKEY_CURRENT_USER\Software\Microsoft\MediaPlayer\Preferences]
"SendUserGUID"=hex:00

You can use the reg command for this as follows:

reg add "HKCU\Software\Microsoft\MediaPlayer\Preferences" /v "SendUserGUID" /t REG_BINARY /d "00" /f

Set the value back to 01 to send the ID again.

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To protect against SYN attacks: From this documentation results that the minimum settings required is as follows:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"SynAttackProtect"=dword:00000002
"TcpMaxPortsExhausted"=dword:00000005
"TcpMaxHalfOpen"=dword:000001f4
"TcpMaxHalfOpenRetried"=dword:00000190

These values are not present on a fresh installed system.

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Disable Remote Registry service using the sc command (also discussed here):

sc stop RemoteRegistry
sc config RemoteRegistry start= disabled

Set the default back with:

sc config RemoteRegistry start= auto
sc start RemoteRegistry