Unfortunately you had a nasty rootkit on board. Even though it is gone now, be sure to read the following information.
BACKDOOR WARNING------------------------------
One or more of the identified infections is known to use a backdoor.This allows hackers to remotely control your computer,
steal critical system information and
download and execute files.
If you do any banking or other financial transactions on the PC or if it should contain any other sensitive information, please get to a known clean computer and change all passwords where applicable, and it would be wise to contact those same financial institutions to apprise them of your situation.
Though the infection has been identified and cleaned, because of it's backdoor functionality, your PC is very likely compromised and there is no way to be sure your computer can ever again be trusted. Many experts in the security community believe that once infected with this type of trojan, the best course of action would be a reformat and reinstall of the OS. Please read these for more information:
How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?When Should I Format, How Should I ReinstallWe can still clean this machine but I can't guarantee that it will be 100% secure afterwards. Let me know what you decide to do. If you decide to go through with the cleanup, please proceed with the following steps.The rundll error is normal, given what I see in your logs and will be fixed in the next steps.
COMBOFIX---------------
Please download
ComboFix from one of these locations:
BleepingcomputerForoSpyware- Disable your AntiVirus and AntiSpyware applications, usually via a right click on the System Tray icon. They may otherwise interfere with our tools. (Click on this link to see a list of programs that should be disabled. The list is not all inclusive.)
- Double click on Combofix.exe and follow the prompts.
- 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 strongly 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.
- 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.
**Please note: If the Microsoft Windows Recovery Console is already installed, or if you are running Vista, ComboFix will continue it's malware removal procedures.
Once the Microsoft Windows Recovery Console is installed using ComboFix, you should see the following message:

Click on Yes, to continue scanning for malware.
When finished, it shall produce a log for you. Please include the
C:\Combofix.txt in your next reply.