Annoying Pop-ups no more

[b]I tried to remove an annoying pop-up from my system for several days. I tried out for all antispyware software in the market but what finally helped me was
www.search-and-destroy.com I did a free scan and found several errors such as spywares,trojans….THANKS….[/b]

I downloaded search and destroy tonight,but when I went to install it,my antivirus said it was a dangerous program called fake antispyware.ain.
anyone know if this is dangerous or not?