Magic Disk is a Potentially Unwanted Program, often mistaken by Adware or a virus. Magic Disk infiltrates your systems during installation of other software, for this reason, it is known as a Potentially Unwanted Program (PUP).
The bad side of Potentially Unwanted Programs is they are installed with Adware. You should scan your computer with comprehensive anti-malware software to clean your computer from these infections.
Potentially Unwanted Programs should be removed as fast as possible. PUPs are known to collect Personal Identifiable Information and display intrusive advertisements while surfing the web. The collection of Personal Identifiable Information, such as your IP-address, your location and browser history, can lead to serious privacy issues or even identity theft.