This dangerous programs monitors traffic and keystrokes and make a backdoor into the system for the hacker's use. Rootkits are often hiding their presence from virus scanners, so, only a scanner specialized in this type of malware can help.
Here is a good program, Radix Anti-rootkit that uses sophisticated methodologies and removes pests and manipulated drivers, system files and processes from your system.
How to use it? Download Radix Anti-rootkit (free, 162Kb), unzip and run it from a USB stick (so windows file protection doesn’t get in the way of the tool). Check all options under ‘1-click Check’ tab. Ignore all warning messages (it is advisable to back up the registry before doing anything, because in some exceptional cases it result in a malfunctioning system)
Now click on ‘Check’ button for scanning. It will take some time to finish the scanning. After all tests complete, select all to fix the problem. After all, the program will display a list of files that have been repaired and modified.