Security experts are warning Internet users about a new piece of <A HREF="http://www.eweek.com/article2/0,1759,1821127,00.asp?kc=enews052705dtx1k0000599">software that poses as a spyware-removal tool</A> but is actually being used to persuade unsuspecting Internet users to download spyware programs and Trojans. The program, SpywareNo, is installed on Internet users' computers without warning, can be difficult to remove and may be accompanied by malicious programs that hijack victims' Web browsers, according to interviews with spyware experts. The company behind the new tool claims that it is the victim of unscrupulous online advertisers who bundle the product with noxious wares. But at least one spyware expert says the new application is just the latest example of so-called "rogue anti-spyware" programs that exploit user naivet