Hijackthis log - any suggestions? - system is slow and uploading a ton of packets?

Logfile of HijackThis v1.99.1

Scan saved at 11:15:01 AM, on 8/3/2007

Platform: Windows XP SP1 (WinNT 5.01.2600)

MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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:\Program Files\Alwil Software\Avast4\aswUpdSv.exe

C:\Program Files\Alwil Software\Avast4\ashServ.exe

C:\WINDOWS\system32\spoolsv.exe

C:\PROGRA~1\SLIMSE~1\server\Bin\MSWIN3...

C:\Program Files\SlimServer\server\slim.exe

C:\WINDOWS\System32\svchost.exe

C:\WINDOWS\System32\BRMFRSMG.EXE

C:\WINDOWS\system32\ZoneLabs\vsmon.exe

C:\WINDOWS\Explorer.EXE

C:\Program Files\Creative\SBAudigy2\Surround Mixer\CTSysVol.exe

C:\WINDOWS\BCMSMMSG.exe

C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.ex...

C:\WINDOWS\System32\LVCOMSX.EXE

C:\Program Files\AWS\WeatherBug\Weather.exe

C:\Program Files\Skype\Phone\Skype.exe

C:\Documents and Settings\Mark\Desktop\HijackThis.exe

C:\Program Files\SlimServer\SlimTray.exe

C:\Program Files\Zone Labs\ZoneAlarm\zapro.exe

C:\Program Files\Skype\Plugin Manager\SkypePM.exe

R3 - Default URLSearchHook is missing

O2 - BHO: AcroIEHlprObj Class - %26#123;06849E9F-C8D7-4D59-B87D-784B7D6BE0B3%26#125; - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll