We need suggestions for anti-virus. We have an administrative lan, Server 2003 (Exchange, SQL, licensing = 40 cals) with 50 pc’s. I’m evaluating the installation of another lan for the student labs (150 pc’s). I have available the old lan OS (BackOffice SBS, 35 cals), and I’m planning to implement it in a server at the labs, to manage the antivirus software. Please, submmit the cheapest solution to be implemented for this two lans. Does the 35 cals limit affect the total of 150 pcs? May I use per server or per seat?