Team viewer is a software function access pc remotely through the internet. 
TeamViewer 4 works on all Windows versions from Windows 98 up to Windows 7 and is also available for Apple Mac OS X. It can even be used for cross-platform connections from Windows to Mac and back. Source: official site


The main requirement to be able to use TeamViewer is:
1. Install TeamViewer on both a PC that will connect remotely (same version)
2. Internet connections are already connected
3. Input ID and password PC to remote connections. ID and Password can use dynamic and determined fashion.


Please download the link below


Teamviewer setup 
Teamviewer portable