Problems with newly installed Ubuntu

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http://askubuntu.com – I just dual-booted my PC with Ubuntu 12.04 alongside Windows 7. I like everything about Ubuntu except two things. First, whenever I click the right mouse button in Firefox, it immediately hangs. I have to kill the process then. It becomes very annoying when I have several tabs open and I forget not to use the right mouse button. I had previously booted Ubuntu with UNetbootin, the same problem was there even then. Secondly, when I had not installed AMD drivers on Windows 7, the laptop was just eating through the battery. Only after installing the drivers, did it come to cool down and started (HowTos)