I'm aware that there may be a trojan on your PC but sometimes redirects doesn't necessarily mean there's one. There may just be a setting in the browser that redirects you. (There was a case here where the user had a search term was altered in the browser's properties and it caused redirects).
OTL and TDSSKiller isn't showing anything, Combofix may do more harm than good in this situation. However, if you insist on running Combofix scan then I will guide you through it. I recommend you backing up any important files before we continue.
Please download ComboFix from one of these locations:
<a title="External link" href="http://download.bleepingcomputer.com/sUBs/ComboFix.exe" rel="external"><>Link 1</></a>
<a title="External link" href="http://www.infospyware.net/antimalware/combofix/" rel="external"><>Link 2</></a>
<>* IMPORTANT !!! Save ComboFix to your Desktop as ComboFix.exe</>
<ul>
<li>Disable your AntiVirus and AntiSpyware applications, usually via a right click on the System Tray icon. They may otherwise interfere with our tools
See <a title="External link" href="http://www.bleepingcomputer.com/forums/topic114351.html" rel="external">HERE</a> for help</li>
<li>Double click on Combo-Fix & follow the prompts.</li>
<li>As part of it's process, ComboFix will check to see if the Microsoft Windows Recovery Console is installed. With malware infections being as they are today, it's ly recommended to have this pre-installed on your machine before doing any malware removal. It will allow you to boot up into a special recovery/repair mode that will allow us to more easily help you should your computer have a problem after an attempted removal of malware.</li>
<li>Follow the prompts to allow ComboFix to download and install the Microsoft Windows Recovery Console, and when prompted, agree to the End-User License Agreement to install the Microsoft Windows Recovery Console.</li>
</ul>
**Please note: (This applies to Windows XP systems only) If the Microsoft Windows Recovery Console is already installed, ComboFix will continue it's malware removal procedures.
<img src="http://img.photobucket.com/albums/v706/ried7/RcAuto1.gif" alt="Posted Image" />
Once the Microsoft Windows Recovery Console is installed using ComboFix, you should see the following message:
<img src="http://img.photobucket.com/albums/v706/ried7/whatnext.png" alt="Posted Image" />
Click on <>Yes</>, to continue scanning for malware.
When finished, ComboFix will produce a log.
<>Note:</>
1. Do not mouseclick combofix's window while it's running. That may cause it to stall!
2. Remember to re-enable your anti-virus and anti-spyware before reconnecting to the Internet.