"not Responding" Shows Up When Obtaining Network Data

I have a few users now on windows 7 enterprise 32 bit and when the applications they are using are obtaining data from server locations the applications go into a not repoding mode.

This is causing the user to log numerous helpdesk calls becuase they think there is a fault and by the time we have took the details the error has cleared due to the fact it was obtaining data. I have looked at numerous things on google such as removing reg items but most of the items were not present.

I have tried the re indexing but this does not work i basically want to stop the not responding appearing, but i cannot find how to do this!3 The pc is brand new, with a build from cd, all drivers upto date and the pc has 3GB ram, core2 duo processor