Removal of lsass. exe 'cloaked malware'

Today, while online, software Prevx CSI notified me that i have a cloaked malware. it is called lsass .exe (with a space) not to be mistaken with lsass.exe, the REAL sytem process.

it is located in C:\Windows\System32\Event Agent\lsass .exe
When I go to Windows Explorer, System32 doesnt even exist for some reason.

How do I get rid of this malware, lsass .exe. it seems to use up alot of memory, more and more every day and is slowing down my computer. Thank you.