Trojans are malicious applications that pose themselves as legitimate software in order to trick users to install them. Once on the victim's machine, it may run any number of malicious process to steal vital information or inflict damage to other software.
Trojan.Xorpix is a backdoor trojan that allows a remote attacker to connect to the infected computer through random port.
Even though the trojan is removed, you may receive the following error message while accessing the firewall settings (Start- Control Panel- Windows Firewall):
"Due to an unidentified problem, Windows cannot display Windows Firewall settings."
To resolve this,
1. Download the file http://windowsxp.mvps.org/reg/sharedaccess.reg
2. Open and Run the downloaded file.
3. Restart the computer.