Type in your browser https://www.teamviewer.com (or just click this link)
when team viewer webpage opens follow steps (see attached photos)
Team Viewer Instructions Printable (PDF)
1) click the download button  
2) open the "TeamViewer_Setup_en.exe" file  
3) click Run - after TeamViewer installs it will open
(write down the team viewer ID & Password SAVE for Later use)
4) ID (See bottom photo)  
5) Password  (See bottom photo)