winotify.dll is a library belonging to an advertising program by AbetterInternet Spyware. This module monitors your browsing habits and distributes the data back to the author's servers for analysis.
This also prompts advertising popups.
Non-system processes like winotify.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues