I get spinning beachball of doom, look in activity monitor and Vshieldscanner is running three processes. This is a new(ish) laptop. Old macbook air never had performance problems of any kind. Happens sometimes every 15 seconds, sometimes every 5 minutes. Lasts for 5 seconds or so.
Macbook air running Yosemite 10.10.5
McAfee endpoint for mac version 2.2.0 (1298)
Console shows nothing in quarantine, all services enabled (on access can etc). Everything like anti-malware being updated quite regularly.
Any recommendations would be welcome.