TDSS loader now got “legs”
This new virus actually infects your network at a basic level, and soon all of your systems will prompt you to 'update' your browser in order to browse the internet. Of course, the 'update' is the virus itself, which then uses your computer to spread further. Nasty.
So never allow any unknown on the web to 'update' or 'install' anything, even if it claims it is required to view something or listen to something, etc. It's most likely a virus trying to get permission to infect your system!