Help! My computer is infected badly with undetectable trojan

Please read carefully. My computer is infected with an unknown undetectable trojan. I tried using Malwarebytes, F secure, Eset, Emsisoft, norton, Kaspersky Virus Removal Too, tddskiller, AVG, McAfee Security Scan Plus and Dr.Web anti-virus scanner. All of them said there no malware found. My computer was doing fine until couple days ago . It keeps slowing down and freezing to point I have to restart and I wasn't even using the internet. I made no new installations of any programs. I did not have any new add ons. Clearly its a undetectable trojan. I want to get rid of this trojan without having to uninstall everything and completely having to start all over again. Also my firefox google search has been disable. When I type in a search word and press enter or click the search button, it doesn't load or do anything. The symptom is not cause by an anti malware program like AVG. My computer was already very slow and freeze before I install the AVG. I complete remove the AGV and the symptoms gotten worst. It seems to have terminated my security systems. I lost access to Dr. Web anti-virus scanner. We dealing with some sort of advance unidentified trojan.

I made a post here and i received no response.
http://www.bleepingcomputer.com/forums/topic452129.html

Help me please.

Hello, I merged all you other posts into one post at the other topic,to help you from being passed over ,see below,
..

Now that your log is properly posted, you should NOT make further changes to your computer (install/uninstall programs, use special fix tools, delete files, edit the registry, etc) unless advised by a Malware Removal Team member, nor should you continue to ask for help elsewhere. Doing so can result in system changes which may not show it the log you already posted. Further, any modifications you make on your own may cause confusion for the helper assisting you and could complicate the malware removal process which would extend the time it takes to clean your computer.

From this point on the Malware Removal Team should be the only members that you take advice from, until they have verified your log as clean.

Please be patient. It may take a while to get a response because the Malware Removal Team members are very busy working logs posted before yours. They are volunteers who will help you out as soon as possible. Once you have made your post and are waiting, please DO NOT make another reply until it has been responded to by a member of the Malware Removal Team. Generally the staff checks the forum for postings that have 0 replies as this makes it easier for them to identify those who have not been helped. If you post another response there will be 1 reply. A team member, looking for a new log to work may assume another MRL Team member is already assisting you and not open the thread to respond.

The current wait time is 1 - 5 days and ALL logs are answered.

If HelpBot replies to your topic, PLEASE follow Step One so it will report your topic to the team members.

To avoid confusion, I am closing this topic.