Yes, you have indeed been infected. But lets clean you up :).
First lets boot into safe mode, and configure windows to show hidden folders. To do this, do the following:
file 1 Click the Start Button
2 In the Start menu click Control Panel
3 In the Control panel Window click the Folder Options Icon
4 The folder Options Window will now Open
5 Click the View Tab
6 In the view tab window look down the list for a section marked Hidden Files and Folders
7 Enable the option Show Hidden Files and Folders by left clicking the radio button on the left of the option with your mouse. Then uncheck Hide protected operating system files. CLick yes to the dialog.
8 Press the Apply button
9 On the next screen press OK to exit
10 You should now be able to view the hidden files and folders.
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1. If the computer is running, shut down Windows, and then turn off the power
2. Wait 30 seconds, and then turn the computer on.
3. When you see the black-and-white Starting Windows bar at the bottom of the screen, start tapping the F8 key. The Windows 2000 Advanced Options Menu appears.
4. Ensure that the Safe mode option is selected. In most cases, it is the first item in the list and is selected by default.
5. Press Enter. The computer then begins to start in Safe mode.
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When in safemode scan again with HJT and remove the following
C:\WINDOWS\system32\mssearchnet.exe
C:\WINDOWS\system32\nvctrl.exe
R3 - URLSearchHook: (no name) - {00A6FAF6-072E-44cf-8957-5838F569A31D} - (no file)
O2 - BHO: HomepageBHO - {4da4616d-7e6e-4fd9-a2d5-b6c535733e22} - C:\WINDOWS\system32\hpAE8.tmp
O3 - Toolbar: AOL Toolbar - {DE9C389F-3316-41A7-809B-AA305ED9D922} - C:\Program Files\AOL\AOL Toolbar 2.0\aoltb.dll (file missing)
O3 - Toolbar: Comcast Toolbar - {4E7BD74F-2B8D-469E-93BE-BE2DF4D9AE29} - C:\PROGRA~1\COMCAS~1\COMCAS~1.DLL (file missing)
O3 - Toolbar: SecurityToolbar - {736b5468-bdad-41be-92d0-22ae2ddf7bcb} - C:\Program Files\Security Toolbar\Security Toolbar.dll
O4 - HKLM\..\Run: [WildTangent CDA] "C:\Program Files\WildTangent\Apps\CDA\GameDrvr.exe" /startup "C:\Program Files\WildTangent\Apps\CDA\cdaEngine0500.dll"
O8 - Extra context menu item: &Search - http://bar.mywebsearch.com/menusearch.html?p=ZNfox000
O9 - Extra button: AOL Toolbar - {3369AF0D-62E9-4bda-8103-B4C75499B578} - C:\Program Files\AOL\AOL Toolbar 2.0\aoltb.dll (file missing)
Click fix Checked
Then while your still in safe mode delete the following files:
C:\WINDOWS\system32\mssearchnet.exe
C:\WINDOWS\system32\nvctrl.exe
Empty Recycle bin
Reboot normally
Then download ewido - http://www.ewido.net/en/ - Scan with that, and let it remove what it finds.
Post a new HJT log, along with the ewdio scan log
