These are extra tools we/I often recommend:
(1)
ad-ware (FREE),
____ (2)
Spybot - Search & Destroy (FREE),
____ (3)
Peerguardian (FREE)
Peerguardian will help keep out prying eyes out of your computer.
To install LW, I always recommend the "Offline" installer. Thus you're not installing over the internet. It's safer ... less chance of a corrupt installation ... less chance of picking up something whilst the data is transfered to your computer. Offline installer has all the installation data is inside it.
Not sure if this answers your question ... but sounds like you may have picked up something nasty. Either an invasion or a virus, etc.