Sage line 50 working very slowly in our network

Hi,

There are 4 computers in our network with 3 users license. When all computers are working in sage that times it takes too long to proceed. I have been advised by the sage support that my antivirus are too strict. But I have put sage in trusted zone in antivirus. Still same problem. There are 3 desktop out of 4 are using windows vista and only one using xp 64 bit. It has also been advised from sage support that xp might slow down the system. But employer do not want to buy new license. Also I have clear some audit trial. No change. Is there anybody can help me from practical experience ?

Many thanks

Abdur