If you are always getting pop-ups and redirected to the website sikxsx.xyz, then an adware is causing this. Sikxsx.xyz is an adware that will attempt to commandeer your browser search and homepage. Clicking “allow” to its push notifications will spam you with popup ads sending you to malicious websites to get money from you or infect your computer further. It may also prevent you from changing your settings back.
The adware Sikxsx.xyz is usually installed through bundled software without you knowing.