>This is probably not the right section for this question. but I could not find any other that looked appropriate.
>
>I have a client who is running my VFP app (native VFP data) though citrix on a Windows Server 2003 box.
>
>Ever since the last security update ( as nearly as we can pinpoint it ), my app is CRAWLING when it is doing intensive data I/O operations ( processing and building dbf’s that can be up to ½ GB ).
>
>The exact same operations that take 15 minutes on my XP box are taking over an hour on his server.
>
>Are there any known issues? Any workarounds?

I don't know the answer but here's an approach you could take:

1. View the server's Application Event Log, looking for MsiInstaller events on or near Patch Tuesday
2. These events will list which KB#'s got installed
3. Check the Citrix site for tech notes or hotfixes related to these KB#'s