Sad that your post is the 4th and the first one with a serious answer
No, LFS (if downloaded from liveforspeed.net) is highly unlikely to contain any malicious code (malicious for your comp that is)...
It is however medically proven that LFS does cause serious physical and mental problems. Namely speedmania, social disabilities, insomnia, severe competition insanity, and a bad case of tennis ankle (your right ankle will develop a lot more muscle). Also, if you don't currently own a good set of pedals and/or a wheel your wallet might not enjoy this game, because in the end you will get one, or two, just so you have a reserve one in case of serious pedalitis.
My doctors given me pills . . . .He sais the swelling will go down, the temperature will drop but the 'brmmm brmmmm' noise is all my own doing and that I need to see a shrink about that . . . .
If you download from the LFS website and are playing the dome then you should have no problems. If your unsure scan it with a virus scanner. If you installed a crack to try and get the game for free, then i hope you did get a virus (im nto saying you did)
/relate - All tracks need a strait to rest the left calf muscle!
Not necessarily, start and end with a force feedback wheel. If it doesn't have force feedback you may aswell stick to keyboard. It's worth every penny, and is what makes the experience complete, a wheel without force feedback is like bread without butter.