360 browser IS definite a MALICIOUS software! DO NOT install it! DO NOT install it! DO NOT install it!
But if you had already do it. Try use this https://geekuninstaller.com/
to Uninstall.
Unfortunately, if you couldn't uninstall 360 completely, which might possibly happen, you MUST reinstall the whole system.
https://www.youtube.com/watch?v=ATzS5PKEbNM
Watch this, or you can find a lot videos about all these scam softwares in youtube.
If u intall even one of these softwares, your computer will be f**ked.