Hello,
I have gone through a couple related topics, but the only one I did find that might be related to this is a topic called SBS2008 Network Slow with any WinXP Computer. The first issue that might be related and stemmed from a specific user who was having crashing issues when opening Excel documents directly from the computer and his machine is WinXP w/ Office 2007.
Following this issue, I received a call from head honcho who said the same thing and so far I do not see any issues of looping on the network (It's really small network) or anything to that extent. What steps should I take to see if it can be fixed or what might be the cause of this issue?