Installation Process Error Message 1618

Hi, I recently wanted to join my friends on Skype, so I decided to install it into my computer system.
However, during the installation an “error 1618” appeared stating that another installation is already in progress and that the other installation must be completed before completing its own installation process.
Does it mean that you cannot run Skype installation process when another installation is on progress?

Feature transfer error
Error: -1618 Another installation is already in progress. Complete that installation before proceeding with this install.
OK
