Swizzor.gen can hook itself on Windows starup by modifying and creating an entry on Windows registry and INI files. Swizzor.gen is spread by exploiting system vulnerabilities upon execution of the malicious files.

Backdoor.Win32.Poison.fdb is being displayed as a threat detected by rogue security program Advanced Spyware Detect. Backdoor.Win32.Poison.fdb may be a real virus if detected by a legitimate programs, but when a warning comes from rogue software, the threat detected may not really present on computers.

Updated: August 18, 2009
Trojan.Win32.Agent.azsy is a threat being displayed as a detected threat by a fake security scanner being performed by a rogue security program called Personal Antivirus. A typical way for rogue programs to deceive computer users into purchasing the registered version of this unwanted product. The threat Trojan.Win32.Agent.azsy may not really exists on your computer
On some instances, if [...]

Advanced Spyware Detect is another bogus antispyware and security application that is an addition to the long list of potentially unwanted program. Advanced Spyware Detect will detect non-existent threats during its scannining and advise users to download the program.

Generic Dropper.cx is a generic detection for trojan that further harm a computer by dropping and execute another malware on to the already infected computer.  

Troj/Virtum-Gen is a trojan that can download and install a copy of malware or rogue software on the victims computer. Troj/Virtum-Gen uses unfair technique and deceiving method to propagate itself on computers connected to internet.

Trojan Horse Generic_R.BO is a generic detection for trojan that can spread on computers by infecting executable files. Trojan Horse Generic_R.BO also downloads and execute additional malware on to the already infected computer.

StealthMBR.a is a trojan designed to infect a Master Boot Record (MBR) of hard disk on a computer. StealthMBR.a is undetectable by security program because it uses a rootkit techniques that makes it stealth.