shapavi
I am inclined to agree with fabion, only some sort of virus or spyware would really cause the problems you are experiencing. It seems that something has got into your computer, made some changes, and I believe has possible given control to someone or something else.
Apart from taking fabion's advice, I would suggest the following:
1) Completely uninstall Limewire, deleting all remaining folders. If you want to keep your existing library then move the files to a newly created folder before deletion.
2) Run your anti-spyware software, I use MS Anti-Spyware, Ad-Aware SE (Personal) and Spybot V1.3.
I would also suggest that you delete all unnecessary temp files, both those found in the temp and temporary internet folders. I was able to find an additional spyware cookie after I did this.
3) Update and run your anti-virus again.
4) Defrag your HD.
5) Download and reinstall Limewire only from the official site:
http://www.limewire.com/english/content/home.shtml
Now your HD will free of any hidden spyware or virus and your copy of LW will be uninfected by the problem you had before.
UK Bob