HP has never gotten their laptop thermal solutions right, sorry cant help you with that.
For the other problem - create a virtual machine with windows installed. Then use a clone of this virtual machine to do your actual surfing. Once that gets infected just make anohter clone of the virtual machine and resume surfing. I am assuming that there is something windows specific in what you are doing, if not just surf in linux and kiss most malware goodbye.
...especially when "Use a Mac" is an equally effective solution, with pretty much equivalent user-friendliness (arguably more, given that so much hacker-friendly software is *nix friendly [and in fact developed on a Mac] and won't run on Windows at all).
