Sound as though you have a corrupt download. Always download from an accredited site or official site, chrome comes with just about every download you can think of? I would unistall, restart your PC then download and install again and make sure of your settings and home page. For example running multiple browsers you MUST have 1 dedicated default browser and deny others, and try not to let them share add-ons, otherwise why run 2 browsers? the default browser is to avoid confusion in the PC. Watch them download the all ask if they can be default. a lot of question in this forum over the last week have been about chrome not working properly, it is not my favorite, I prefer IE9 and FF, but to each his own.