So maybe Steven clicked somewhat too fast. Quite understandable. I had to reinstall Windows 7 (plus a lot of programs) myself this week twice and suddenly (before installing Avast 7, I'm rather sure) found Google Chrome on my PC.
And that webrep add-on can easily be inactivated if you prefer WOT or McAfee's SiteAdvisor.
It's amazing to see how many useful programs today come with programs you don't need or don't want. You really should be close attention to all dialog screens.