This is caused by something running on your computer. If you Google "hsimp=yhse-001" you will find many references. I spent 5 minutes trying to work out what it is, but all the discussions I read were all confused - I think it may be some kind of virus scanner redirecting you, or a buggy browser plugin, or possibly even a virus. Regardless, it's not an Composr issue, it's an issue on your own machine.