My macbook, sometimes, out of sudden my safari will pop up ads website such mackeeper etc2
Not sure is it what u meant by adsware
I think i got it after browsing some free online movie streaming website
Any idea how to clean it?

thanks for your suggestions.
done both suggestions, cleared my browsers and
i installed malwarebytes (as it comes with free premium) and it quarantined few files
so far being using my mac for few hours and the pop-up havent happen yet (hopefully the problem resolve, touchwood)

however, i gatal tangan went and delete unused apps and now become another problem
everytime i boot in my macbook, it will pop-up "uninstaller quit unexpectedly
i opened a thread in helpdesk section, if any of you can come out with solution please help me there
thank you so much

https://forum.lowyat.net/index.php?showtopic=4426170

thanks bro,
yeah installted it trial 30 days premium
but the license rm180 per year though

anyhow with regards to my problem, it is gone after updated to high sierra
but my macbook become lag pula