If you are getting notifications from MemoryConfig, then your Mac is infected with adware. MemoryConfig is adware for Mac.
MemoryConfig changes setting in your Mac. First, MemoryConfig installs a browser extension in your browser. Then, after MemoryConfig 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.