Troubleshooting XP

Office docs on network very slow to open Office docs on network slow to open. Pdf on network open easily...

Microsoft Help & support - firewall 

Using Group Policies to control access

Group Policy XP Professional - by the Elder Geek  Explains workstation setting of group policies for XP - settings have to be setup on each individual computer for a workgroup (can be setup once on a server for all workstations).