is Semantec just scanning the SQL Server as an agent service or is it executing as an enterprise platform for a number of servers in your organization ?

if it is just an agent on the SQL Server this excessive paging may be due to the fact that there may not be the appropriate 'exclusions'. By that I mean it is trying to scan your .mdf, .ndf & .ldf files for all of the databases. Also, .bak and .trn files should be excluded as well.