Qttask.exe is a legitimate process, which is responsible for starting Apple's QuickTime Player and other functions that are related to it. This program is mostly installed with Itunes but it can also be installed alone.
Qttask.exe is a harmless process, so you can leave it on your computer. However, it's not an essential part of the system, so ending it won't harm it. In some of the cases, it is advised that people disable Qttask.exe because this can help them prevent the loss of their necessary system resources. This process is mostly located in C:\Program Files folder and should use about 750KB of your memory.
Malware creators have started using names of legitimate files so that they could hide their viruses. If you found that Qttask.exe is located in C:\Windows or C:\Windows\System32 folder, you should check your computer with reliable security application. In this case we recommend using RegCure Pro.