qcwlicon.exe is a process from IBM which allows a user to see the wireless connection status, as well as, be able to turn it on or off. This is a non-essential process.
Disabling or enabling it is down to user preference.
Non-system processes like qcwlicon.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