BleepingComputer.com: Firewalls disabled, Google/Yahoo Redirect/McAfee Alerts

Sorry, I wasn't able to read the "before you post" thread since it's making Firefox crash on me for some reason.
Computer runs Windows 7 64-bit, the Home edition

Anyway, my computer is having numerous problems.
1. Google and Yahoo searches automatically redirect me
2. Windows Defender, Windows Security Center, and Windows Firewall are all disabled
3. McAfee Firewall is disabled, and the options to turn features on/off are all greyed out.
4. McAfee keeps popping up saying it's found and removed a trojan (Artemis!C...something I'll post the exact name next time I see the thing)
5. iexplore.exe runs in the background without me asking it to
6. Internet Explorer starts playing sounds in windows that don't exist.

Now, MBAM, McAfee, and Lavasoft Ad-Aware find nothing. Removing cookies, temporary internet files, etc. finds nothing.
I've tracked the problem with the firewalls down using services.msc. Found out that McAfee's firewall is dependent on the Windows Firewall. Windows Firewall is in turn dependent on the Windows Firewall Authorization Driver. Using device manager, the driver has a yellow exclamation point next to it, and I can't get the driver to start. It tells me "Cannot create a file when that file already exists"

Now, I'm not sure what the next step is to hunt down and remove these problems. It seems to me that getting the firewalls operational would be a good start, that might stop the Artemis trojan from trying to attack, but how to do this has gone beyond me.

Any ideas or suggestions would be greatly appreciated.

With the information you have provided I believe you will need help from the malware removal team.
Please make sure that you read the information about getting started first.
Then start a new thread HERE and include or required logs.
Including a link to this thread will be helpful.

Good luck and be patient. Help is on the way!

Hello,

Now that you have posted a log here: http://www.bleepingcomputer.com/forums/topic428604.html 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 MRT Team member, nor should you ask for help elsewhere. Doing so can result in system changes which may not show in 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 MRT 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 MRT Team members are EXTREMELY 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 MRT 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 MRT Team member is already assisting you and not open the thread to respond.

Please be patient. It may take several days to get a response but your log will be reviewed and answered as soon as possible. I advise checking your topic once a day for responses as the e-mail notification system is unreliable.

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. Good luck with your log.

Orange Blossom