Kan ikke slette eller ændre ved filer *.exe filer eller desktop

Her er lige en hijackthis log:
Logfile of HijackThis v1.98.2
Scan saved at 19:38:59, on 26-08-2004
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:\WINDOWS\system32\spoolsv.exe
C:\Programmer\Fælles filer\Symantec Shared\ccSetMgr.exe
C:\Programmer\Norton AntiVirus\navapsvc.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\Programmer\Norton AntiVirus\SAVScan.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmer\Fælles filer\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\WINDOWS\System32\ctfmon.exe
C:\progra~1\valve\steam\steam.exe
C:\Programmer\Fælles filer\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\explorer.exe
C:\Programmer\Outlook Express\msimn.exe
C:\Programmer\Messenger\msmsgs.exe
C:\Programmer\MSN Messenger\msnmsgr.exe
C:\Programmer\Adobe\Acrobat 6.0\Reader\AcroRd32.exe
C:\Programmer\Internet Explorer\iexplore.exe
C:\Documents and Settings\Tylzen\Dokumenter\Billeder\hjt.exe

O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmer\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Programmer\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Programmer\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NvMcTray.dll,NvTaskbarInit
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [Steam] "c:\progra~1\valve\steam\steam.exe" -silent
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://v5.windowsupdate.microsoft.com/v5consumer/V5Controls/en/x86/client/wuweb_site.cab?1093207779169
O16 - DPF: {68BCE50A-DC9B-4519-A118-6FDA19DB450D} (Info Class) - http://www.blizzard.com/support/includes/cabs/si.cab
O16 - DPF: {70BA88C8-DAE8-4CE9-92BB-979C4A75F53B} (GSDACtl Class) - http://launch.gamespyarcade.com/software/launch/alaunch.cab
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/2004061001/housecall.trendmicro.com/housecall/xscan53.cab



Problemmet er at jeg ikke kan slette noget som helst på mit skrivebord eller slette/ændre nogen som helst *.exe filer.

Nogen der ved hvad der kan forudsage dette?
Jeg har scannet med Norton Antivirus 2004 (opdateret)
Adaware (opdateret) og Trendmicro Housecall.
De har ikke fundet noget som helst.

Jeg kan ikke hente visse programmer ned heller, som f.eks. spybot el. spyware search and destroy.