olemus
(a) mikroorganismide hävitamine elututelt objektidelt
Wiktionary:
treatment with disinfectant materials in order to destroy harmful microorganisms
https://en.wikipedia.org/wiki/Disinfectant

https://www.merrymaids.com/cleaning-tips/quick-tips/how-to-clean-and-disinfect-electronic-devices/

(b) ülekantud tähenduses:
kahjurvaranakkuse kõrvaldamine
= removal of malware