It is essential that TeamViewer should be installed in both the computers, the one which is to be remotely controlled and the one that will control it. In a similar way you can take full control of the remote compute and operate it as if you are sitting in front of it. The remote person cannot access your desktop unless you give the code or password. Once the problem is solved you can stop the remote access and continue as usual. This expert from remote place can find out the problem with the software and also solve it.
You can see all the operations being performed by this person. He will be able to operate your computer just like you are operating it. Once this person puts the code he/she can get full control over your computer. When you start the software you get a code, give this code to the person located at the remote place having TeamViewer installed. Let us say you have software related problem in your computer and you are not able to solve it, all you have to do is just install TeamViewer and run it. TeamViewer is available not only for computer operating systems like Windows, Mac and Linux, but also for mobile operating systems like Android and iOS. TeamViewer is excellent software for allowing the control of your computer from remote places, sharing the desktop and transferring the files between the computers or compatible devices all through the internet.