I've asked practically the same question before, but the answering it and the timing of what was going on didn't really work out... we were changing things in the network which afforded better troubleshooting opportunities but it didn't go very quickly...
The issue I am having is that a user on a Windows XP Pro (SP2) PC tries to access Microsoft Word or Excel files from the file server and they can take up to 45 seconds give or take to open. The machines are up to date and the network is quick and files open fairly quickly. This delay is unnecessary and annoying.
Okay, so this was happening before when I asked the question. There seemed to be other users experiencing it from time to time, but as I investigated it, it seemed to just be this one PC. Then someone suggested opportunistic locking as the problem, in the former question. When I checked that out, it seemed completely unlikely, as I found out that hardly anyone ever accesses these same files as the user with the problem. So, it didn't seem necessary to try that. And really, turning that off didn't seem like something I'd want to try, as I would like to see the file locked if someone does have it open. (...if I understand this correctly.)
So, the problem didn't seem likely to be with the server, as it seemed that other users weren't have the problem. And then there came a network and server upgrade, so I really wanted to wait on that. It didn't happen as quickly as I thought. So, anyone that was involved in that former question, sorry, my time ran out.
Anyway... the network was upgraded to gigabit and the file server replaced by a much more powerful one, that was new (by the way). And the Windows XP machine still has the same problem! And other PCs are not having this problem. So, other than reinstalling this OS on this PC, does anyone have any suggestions why it might be doing this? (Sorry such a long explanation.) Thanks. With the problem still happening, I've kind of got pressure on me to get it fixed.