Server is running Windows Server 2008 and as far as I know the client PCs are as delivered from supplier....

Company has used a FE/BE Access97 application for years.
BE tables are linked when main menu form is loaded after the logon screen. It has always taken about 30 secs for each user (12 in total)to connect to all tables in BE, but once the user is connected, the performance is excellent.
Some users have now upgraded to W7 and the linking to BE is now instantaneous!! !!
Whatever could have changed? (not that they're complaining...