Trojans Need Help

I had all kinds of popups and errors on my dell xp computer. I used Trend Micros programs and it found troj_vundo. Some stuff like java isnt working properly and freezes in internet explorer often. Ive used Avg and avast and got rid of some but cant fix em. What can I do?

It is vitally important that combofix is renamed before it is even started to download

Please download ComboFix from Here or Here to your Desktop.

Note: In the event you already have Combofix, this is a new version that I need you to download. It is important that it is saved directly to your desktop

[*]If you are using Firefox, make sure that your download settings are as follows:
-Tools->Options->Main tab
-Set to “Always ask me where to Save the files”.

[*]During the download, rename Combofix to Combo-Fix as follows:

http://i266.photobucket.com/albums/ii277/sUBs_/combofix/CF_download_FF.gif

http://i266.photobucket.com/albums/ii277/sUBs_/combofix/CF_download_rename.gif

[]It is important you rename Combofix during the download, but not after.
[
]Please do not rename Combofix to other names, but only to the one indicated.
[]Close any open browsers.
[
]Close/disable all anti virus and anti malware programs so they do not interfere with the running of ComboFix


[*]Very Important! Temporarily disable your anti-virus, script blocking and any anti-malware real-time protection before performing a scan. They can interfere with ComboFix or remove some of its embedded files which may cause “unpredictable results”.
[*]Click on this link to see a list of programs that should be disabled. The list is not all inclusive. If yours is not listed and you don’t know how to disable it, please ask.

[*]Close any open browsers.
[*]WARNING: Combofix will disconnect your machine from the Internet as soon as it starts
[]Please do not attempt to re-connect your machine back to the Internet until Combofix has completely finished.
[
]If there is no internet connection after running Combofix, then restart your computer to restore back your connection.


[*]Double click on combofix.exe & follow the prompts.
[*]When finished, it will produce a report for you.
[*]Please post the “C:\ComboFix.txt” along with a new HijackThis log for further review.

Note: Do not mouseclick combofix’s window while it’s running. That may cause it to stall

Click here to download HJTsetup.exe

[*]Save HJTsetup.exe to your desktop.
[*]Doubleclick on the HJTsetup.exe icon on your desktop.
[*]By default it will install to C:\Program Files\Hijack This.
[*]Continue to click Next in the setup dialogue boxes until you get to the Select Addition Tasks dialogue.
[*]Put a check by Create a desktop icon then click Next again.
[*]Continue to follow the rest of the prompts from there.
[*]At the final dialogue box click Finish and it will launch Hijack This.
[*]Click on the Do a system scan and save a logfile button. It will scan and the log should open in notepad.
[*]Click on “Edit > Select All” then click on “Edit > Copy” to copy the entire contents of the log.
[*]Come back here to this thread and Paste the log in your next reply.
[*]DO NOT have Hijack This fix anything yet. Most of what it finds will be harmless or even required.