winsync.exe is a time synchronization software from Truetime. This process will synchronize your computer's clock by accessing the Internet with time servers. This is a non-essential process.
Disabling or enabling it is down to user preference.
Non-system processes like winsync.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues