cryoganix...have your client victims read this:
The practice of using keygens, hacking tools, cracking tools, warez, torrents or any pirated software is not only considered illegal activity but it is a serious security risk which can turn a computer into a virus honeypot or zombie.
Cracking applications are used for illegally breaking (cracking) various copy-protection and registration techniques used in commercial software. These programs may be distributed via Web sites, Usenet, and P2P networks.
...warez and crack web pages are being used by cybercriminals as download sites for malware related to VIRUT and VIRUX. Searches for serial numbers, cracks, and even antivirus products like Trend Micro yield malcodes that come in the form of executables or self-extracting files...quick links in these sites also lead to malicious files. Ads and banners are also infection vectors...
Keygen and Crack Sites Distribute VIRUX and FakeAV
...warez/piracy sites ranked the highest in downloading spyware...just opening the web page usually sets off an exploit, never mind actually downloading anything. And by the time the malware is finished downloading, often the machine is trashed and rendered useless.
University of Washington spyware study
...One of the most aggressive and intrusive of all bad websites on the Internet are serial, warez, software cracking type sites...they sneak malware onto your system...Where do trojan viruses originate? One of the biggest malware distributors on the Internet are serial/warez/code cracking sites.
Bad Web Sites: Malware
...a staggering 59% of the key generators and crack tools downloaded from P2P networks represent a security liability since they contain malicious and unwanted code. "25% of the Web sites we accessed offering counterfeit product keys, pirated software, key generators or crack tools attempted to install either malicious software or potentially unwanted software. A significant number of these Web sites attempted to install malicious or unwanted code...In addition to the peer-to-peer networks, 11% of the key generators and crack tools downloaded from Web sites were also plagued by malicious and unwanted software.
Microsoft Reveals the Risks of Using Pirated XP and Office
Whatever You Do, Do Not Download Windows 7 Via Torrent Sites
When you use these kind of programs, be forewarned that some of the worst types of malware infections can be contracted and spread by visiting crack, keygen, warez and other pirated software sites. In many cases, those sites are infested with a smörgåsbord of malware and an increasing source of system infection. Those who attempt to get software for free can end up with a computer system so badly damaged that recovery is not possible and it cannot be repaired. When that happens there is nothing you can do besides reformatting and reinstalling the OS.
I strongly recommend that you remove all cracks and keygens immediately to reduce the risk of infection/reinfection. If not, then we are just wasting time trying to clean your system. Further, other tools used during the disinfection process may detect crack and keygens so they need to be removed.
Using these types of programs or the websites visited to get them is very likely how your computer got infected!!