I've been getting pop-ups that won't go away no matter what I do. It's been a long time since I was infected with anything, so I'm a bit out of practice reading these log files. Can you help me?
Logfile of HijackThis v1.99.1
Scan saved at 1:38:05 AM, on 2/26/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.5730.0011)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\MSN Messenger\usnsvc.exe
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\Explorer.EXE
C:\windows\system\hpsysdrv.exe
C:\HP\KBD\KBD.EXE
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\BroadJump\Client Foundation\CFD.exe
C:\Program Files\Microsoft IntelliPoint\point32.exe
C:\After Dark\After Dark.exe
C:\WINDOWS\NCLAUNCH.EXe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
c:\progra~1\intern~1\iexplore.exe
C:\Program Files\SBC Self Support Tool\bin\mpbtn.exe
C:\Program Files\Teamspeak2_RC2\TeamSpeak.exe
C:\Program Files\Spybot - Search & Destroy\SpybotSD.exe
C:\DOCUME~1\Owner\LOCALS~1\Temp\Temporary Directory 1 for hijackthis.zip\HijackThis.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\wuauclt.exe

Thanks so much.