We had upgraded our server two years ago. We had upgraded to Windows SBS 2008 from 2003. Now recently we had added 25 new clients with Windows XP on them. Everything is connected and looks to be working well. But we are facing problem related to some performance. The network performance between XP client and Windows SBS is quiet low. Whirl compared to that if we do the same on older client the system is far more better. I am not able to troubleshoot the performance problem here. I hope there will be some way to deal with the problem. The system performs relatively slow only when I try to move large documents and media files.