The is no virus program running realtime on the server

>Have you set realtime scanner exclusions for your app directory in the virus scanner?
>
>>Hi,
>>
>>One months ago I completed an install of windows server 2008 r2 for a company of
>>about 20 client using windows xp, visto and windows 7.
>>
>>At the first the significance issues is index corruption. I solved this problem by setting SMB2 to 0
>>
>>Now I have another big issue. Visual Foxpro program ran very slowly on this network.
>>
>>How can I solve this problem.
>>
>>Thanks in advance