My computer also went very slow. The issue was having HitmanPro.ALERT installed in combination with trying to use the ESET Banking protection feature. Every time I clicked the Banking protection tile/link, my CPU activity increased by about 17%. So after several clicks, the CPU was 100% and the computer unusable. Uninstalling HMP Alert solved this issue.
See also this topic: https://forum.eset.com/topic/6298-ess-v9-banking-protection-and-hitmanproalert/ The ESET IS Banking protection feature still has the same compatibility isssues with HitmanPro Alert. Similar symptoms: Browser does not open, unless HitmanPro Alert is uninstalled. (#TICKET 177661)