If you are getting notifications from UniversalSupport, then your Mac is infected with adware. UniversalSupport is adware for Mac.
UniversalSupport changes setting in your Mac. First, UniversalSupport installs a browser extension in your browser. Then, after UniversalSupport hijacks your browser, it modifies settings in the browser. For example, it changes the default home page, modifies search results, and displays unwanted pop-ups in your browser.