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VFP9 exe runs slow on WIN7 64-bit machines

35 - 40 concurrent sessions running a single VFP9 exe file on a virtual (Hyper v) windows server 2008 R2 SP1 12 GB RAM 64-bit server. Host machine is a Windows Server 2012 R2 standard 486 GB 64-bit Dell T420 machine.

1 user can log in and a specific application task will take 8-10 seconds. Additional users logging in extend the application time to 35-45 seconds. A new Win7 professional 64-bit 4 GB RAM machines takes 1:10 seconds to perform the same task with multiple users logged in. Older style 32-bit machines seem to run faster than the 64-bit machines, but overall time to perform tasks has gotten significantly worse with all machines.

Most users are running WIN7 professional (mix of 32 and 64 bit machines). What can I do to facilitate faster application response time on our network? I assume from reading other posts it's not a VFP issue as much as they way the network is allowing data to be accessed. Is that correct? If so, what's a user to do that depends on VFP9 ??

Thanks for your response.
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Thanks for your quick reply's and suggestions. We're going to be attemping some of these fixes next week and I'll be able to report back. Any other last minutes thoughts...please feel free to send over.
We were able to turn off SMB2 and added a regedit entry to disable opportunitic locking. This significantly reduced task time from 46-55 seconds down to 8-10 seconds on WIN7 machines. Thanks for your helpful suggestions!