My computer appears to be possessed. Yesterday, all by itself{?}, Google Chrome installed itself on my computer and I started getting a message saying that "IE is no longer your default browser" I then found that any time I'm in Windows Live Mail and try to click on an e-mail link that will take me to another site or to the Internet, I get the error message  "Class Not Registered". I uninstalled Google Chrome but that didn't help.  I am running windows 8.1. I am at a losss as to what to do.

Thanks,  Scott"