Hi , recently my computer started making random number.exe files in prefetch folder in windows , are they dangerous ?

Here's my log from hijack

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 21:13:15, on 2010-08-11
Platform: Windows XP Dodatek SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
Boot mode: Normal

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\nvsvc32.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:\DOCUME~1\WACICI~1\USTAWI~1\Temp\svcnost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\RTHDCPL.EXE
C:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\msco rsvw.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Program Files\HP\Digital Imaging\bin\hpqSTE08.exe
C:\WINDOWS\system32\msiexec.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Trend Micro\HiJackThis\HiJackThis.exe

it seems that i can't post the second half of scan because it doesn't allow me to post llinks ...

edit: damn i think i made this post in wrong forum. :/