How do I get rid of this?

[Jayoung Byun]

It all started when I noticed my computer which is normally pretty fast slow down a lot. So I checked task manager and It said that my CPU was going 40-60%. I found what was causing it which was called "Altisik Service" and ended the task. Around 3 minutes later, my computer became slow again and I ended it again. I tried searching it up but nothing about "Altisik" came up. I think I accidentally installed "Altisik" while trying to install something called optifine but clicked on the wrong download button or something. For some reason It wouldn't let me take a screenshot when task manager was

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