I'm in trouble with Veeam Backup 6.5 - 7.0 and Vipre Business Premium Antivirus, i'll try posting on forums to know if someone else experiencing same problem:
Found out that this antivirus is sloooowing down Veeam Backup, exactly the Transport role(veeamagent.exe), even with all kind of exclusion set up on antivirus agent, the read process on source datastore is really slowed down(512Kb/s). The only way to get backup work properly is shutting down antivirus agent.
I have supported ticket open with Veeam and Antivirus Vendor, but seems hard to find a solution;
The biggest problem is that customer using existing windows virtual machine as veeam backup server, and removing antivirus from production machine is not a good idea..
Looking forward, any kind of ideas are welcome!

Luca