Exterminate listed all the malwares and registry changes done by them, like task manager, registry edit was disabled. I tried trial version of Bit Defender, Sunbelt Spyware, Claim Win, A-Squared, but they were unable to do a complete detection and removal of malwares. I have licensed McAfee, which is good for nothing and was unable to protect my laptop from these malwares. My Windows XP Media Center OS was infected with Win32.Renos, Backdoor, XPAntivirus, Xta.kill trojans, spyware as I use rapidshare links a lot. A Big thanks to you people, who have developed this product.