mikereid,
Alureon and Malotob (which you say are in the chest) are a right pain to remove.
Seems a funny coincidence, but until you know otherwise, those infections should be treated as real.
They could be the reason you have no internet, or it could be some files that were deleted causing it.
Best thing first is to make sure the infection is not still present, look at replacing lost files second.
I'd try MBAM or SAS. (SAS has a toolkit that can effect certain internet-based repairs.) Get MBAM
Here (free version - blue) and SAS
here (free version, lower download.)
The instructions below are for MBAM.
-Download the installer file,"mbam-setup.exe" using a good computer, to a clean USB stick (Flash drive.)
-Copy the installer to the good computer (desktop), and install it on that computer, by double clicking the file and following the prompts.
-Update it on that computer.
-Once the update is complete, locate the folder ''
C:\Documents and Settings\All Users.WINDOWS\Application Data\Malwarebytes\Malwarebytes' Anti-Malware" (if using vista the path may start with "users" rather than "documents and settings" and locate the file "rules.ref". This file will be about 3.2MB in size. OR, run a computer search for the same file.
-Once the file is found, copy it to the flash drive.
-Check on the sicj computer which database is currently installed in Avast. Right click the tray icon, left click "about" and look to the VPS version. If that version is 091203-0, (ie: it hasn't updated to the version that fixed this) stop the on-access protection in Avast, and pause all providers.
-On the good computer,do the "safely remove hardware" thing, remove the flash drive, plug it into the sick computer.
-Copy the installer file "mbam-setup.exe" to this computer.
-Run the file by double clicking it.
-Once it has installed, navigate to the same folder
C:\Documents and Settings\All Users.WINDOWS\Application Data\Malwarebytes\Malwarebytes' Anti-Malware and copy the "rules.ref" file from the flash drive to the sick computer. Windows will produce a prompt: "File already exists; do you want to replace this file (date) with this file(date)?" Click yes. If you don't get this warning, you are in the wrong location. Find the right location. (The above path is for Windows XP.)
-Open MBAM by double clicking on the desktop icon. (It is cerise/maroon in colour, with a white M)
-Command it to run a quick scan. At the end of the scan it will produce a report.
-Place a tick in the box beside everything it finds and select "remove selected". If you are prompted to reboot to finish removal, please do so promptly.
-Try your computer for connection.
-Please post the scan report.
Hope this works.