What post mine probley Any way you have a worm Called "Alcra" This is the reason your limewire keeps poping open its a real pain.The way to get rid of it is to use AVG Anti virus.And this is fact not many other Anti Virus can see it in your system.So here is a download of AVG if you have not got it yet.
AVG Anti-Spyware - Reviews and free AVG Anti-Spyware downloads at Download.com
This is a free Program and do's not have a time limit like others.
Hope This helps.