[citation][nom]elbert[/nom]I'll add a sixth which is a packaged installer in one of the leading free anti-virus programs. Avast has a huge market share and with every install their is a high number of those installing chrome. Many don't unclick the optional install thus many systems have 2 or more browsers.[/citation]
Yep, that strategy is like malware! However, uhh, note that many people have multiple browsers because they like, say, firefox, but IE is included in the os. Heck, in an XP vm I have IE8, FF3.6, Opera, Chrome, Netscape (seriously, just for fooling around), and Safari. OK, I just about never use all of those, but it's nice to have them around just in case.