Unfortunately, there are probably a dozen or more things that can cause slow transfers.

If AC imports worked fine with XP and are now slow on Win7, ask your IT guy to read through the following painfully long thread (in addition to the one previously posted above):
http://social.technet.microsoft.com...ead/4537c7b6-9761-41c5-8b47-0ecb831c8575

I can say with a high degree of certainty that it is not a RAM, SQL, P-P or server issue. Most issues lie with Win7 OS registry settings or services or with the network card drivers or settings.

Regards,
Pierre