think I've got Alexa, how to get rid of that pest?

Hi Everyone:

I'm quite new in this forum, so I'll try to be concise.
My connection looks to have some activities even when I am not working, and with all tasks closed. And of course it began to go slowly and sometimes rejecting to go to some web links like internet portals and so...

Here I post the HJT log so as someone could help me in this annoyance trouble:

Logfile of HijackThis v1.97.7
Scan saved at 18:42:38, on 16/06/2004
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

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\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\slserv.exe
C:\Archivos de programa\Trend Micro\PC-cillin 2002\Tmntsrv.exe
C:\Archivos de programa\Trend Micro\PC-cillin 2002\PCCPFW.exe
C:\PROGRA~1\Logitech\MOUSEW~1\SYSTEM\EM_EXEC.EXE
C:\Archivos de programa\Trend Micro\PC-cillin 2002\pccguide.exe
C:\Archivos de programa\Trend Micro\PC-cillin 2002\PCCClient.exe
C:\Archivos de programa\Trend Micro\PC-cillin 2002\Pop3trap.exe
C:\Archivos de programa\Trend Micro\PC-cillin 2002\WebTrap.EXE
C:\Archivos de programa\Internet Explorer\IEXPLORE.EXE
C:\Documents and Settings\John\Mis documentos\Sasser virus\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Vínculos
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O17 - HKLM\System\CCS\Services\Tcpip\..\{A9996AD6-9E29-45B5-ACC2-ADE5F52FF4AA}: NameServer = 62.36.225.150 62.37.228.20


Any help would be very appreciated