Stop waiting for network response when booting your PC

When you start your Windows XP, it automatically read the IP address on your network and this can block your PC for a while. To solve this problem, you have two options:

First Solution

Disable all your network cards before turning off the PC and then reactivate if necessary. To do this:
Go to Control Panel> Network Connection
Right click on your active network adapter> Disable

Second Solution

Disable the reading of the IP address when booting the PC. This requires a modification of the Registry:
Backup your registry database if necessary.
Open the Registry Editor

Locate the key:

 HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\CurrentVersion\Winlogon

Double click DWORD Value SyncForegroundPolicy and set it to 0