i mightve been hacked, help!

im pretty sure my laptop that runs on windows was hacked and im not sure what to do? ive run the antivirus within my computer along with malwarebytes, i've deleted everything i have downloaded, and a lot more and it will stop for a weed and it will start again. whenever i am in microsoft edge or chrome my computer will randomly open another tab and then start typing in a website to a malware software. im able to exit the search ajd then shut down my laptop but idk what to do