I have an issue that we've been working for a while and we've narrowed it down to a problem between Windows XP and Windows 2008 R2. Here is the situation:
We have a client that is running in a mixed environment - Windows XP SP3, Window Vista, Windows 7, Windows SBS 2003, Windows 2003, and Windows 2008 R2.
The problem is that the Windows XP machines on the main office LAN are seeing very poor performance running applications and accessing files on the new Windows 2008 R2 server. Windows Vista and Windows 7 clients are not having these issues at all; they are running great.
What might be the cause of the poor performance between Windows XP and Windows 2008 R2?