A pervasive problem for many free apps at Google Adwords for years, now the scammers have gone after Google Chrome itself at Bing:
https://plus.google.com/+JeremyCollake/posts/3k1iyhUETgJ?pid=6134026283664019986&oid=110469164034872408057
Yup, this is why you should not trust the ads.
And funny fact, if you Google "Gmail" or "Teamviewer", they are using the Adwords for them, even they are the first result, I guess this is for prevent the other ads pushing them below the "First" result, which is the ads. ;D