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.
Trojan.Clicker.Agent.po is a nasty Trojan designed to create a security-free conduit for supplementary malware applications to be downloaded and installed onto your computer. Due to the decrease of your security system settings, any sensitive information that is stored on your machine is put at risk of being leaked to a remote attacker.
Technical details (How to remove Trojan.Clicker.Agent.po(pop up))