Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
Rootkit.Agent.ahb is a malicious Trojan that is usually downloaded and installed onto your computer through a security hole. It installs itself into the registry in order to create a backdoor, providing a remote hacker unauthorized entry to your system. Rootkit.Agent.ahb employs advanced Rootkit techniques to remain hidden from the user while performing its malicious acts. This parasite can also avoid detection from most anti-virus and anti-spyware applications and, therefore, can be extremely difficult to remove. Rootkit.Agent.ahb is considered a high-level threat to your security, and should be removed from your system immediately.
Technical details (How to remove Rootkit.Agent.ahb(pop up))