I bought a Dell Latitude with Win XP Pro with SP1 installed. I'm having problems while connecting it to domain. It takes a long time to log on to domain and the users' shared directories with Read Write Permissions also takes minutes to get through.
You can disable this through the Group Policy MMC snap-in. Under Computer Configuration-->Administrative Templates-->System-->Logon, change "Always wait for the network at computer startup and logon" to ENABLED.
This was first published in June 2004