Re: Weak wifi signal strength
90% is highly exaggerative. Any machine you buy with Windows or OSX pre-loaded will also come with drivers designed for all the on-board hardware installed. In Ubuntu, the drivers might be made available by the HW manufacturer (otherwise they have to be reverse-engineered), but they still have to be installed. Ubuntu has come a long way in this area, and in most cases, driver installation is fully automated or very easy.
First thing we need to know is your specific hardware.
sudo lshw -C network
Jane, stop this crazy thing!