Login Issue

I have a laptop Toshiba A4 with 512 mb ram. It has Windows XP Pro loaded and
logins into a 2003 domain. I do have a login script to map drives and
off-line file sync is enabled. This user travels. In addition, Norton
Antivirus is and Microsoft Antispyware is installed as well as the tools that
come with toshiba machines.

Please note I'm not having this issue in general on the domain only with
this laptop. The problem is the login time is extremely slow. It hangs on
logging into windows for about 5 minutes and then goes through the normal
applying computer settings and network connections at a fairly decent speed.

I've checked the nick card to make sure it's on auto, changed the cable for
the network, dns, dhcp made sure the wiresless was turned off and I've even
checked the event viewer for errors and made sure it overwrites. No luck
it's still extremely slow and it hangs on logging on to windows.

Can anyone perhaps shed some light on this subject?