[Resolvido!]Não consigo instalar nenhum antivirus

Não consigo instalar nenhum antivirus, nenhum arquivo .exe é instalado...

Os executáveis desaparecem em segundos quando os procuro.!

Abaixo o log do Hijack...

alguem me ajude pro favor!!!!!!!!!

Logfile of HijackThis v1.99.1

Scan saved at 13:46:16, on 2/1/2007

Platform: Windows XP SP2 (WinNT 5.01.2600)

MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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:\WINDOWS\Explorer.EXE

C:\Arquivos de programas\YourWare Solutions\FreeRAM XP Pro\FreeRAM XP Pro.exe

C:\WINDOWS\system32\sistray.exe

C:\WINDOWS\system32\drivers\CDAC11BA.EXE

C:\Arquivos de programas\Arquivos comuns\Microsoft Shared\VS7DEBUG\MDM.EXE

C:\WINDOWS\system32\svchost.exe

C:\Arquivos de programas\Internet Explorer\iexplore.exe

C:\Arquivos de programas\eMule\emule.exe

C:\Arquivos de programas\Internet Explorer\IEXPLORE.EXE

C:\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page =

&http://home.microsoft.com/intl/br/access/allinone.asp

O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Arquivos de

programas\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll

O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k

O4 - HKCU\..\Run: [FreeRAM XP] "C:\Arquivos de programas\YourWare Solutions\FreeRAM XP

Pro\FreeRAM XP Pro.exe" -win

O4 - HKCU\..\Run: [bPS Spyware Remover] C:\Arquivos de programas\BulletProofSoft.com\BPS Spyware & Adware Remover\SpyRem.exe

O4 - Global Startup: AutoCAD Startup Accelerator.lnk = C:\Arquivos de programas\Arquivos comuns\Autodesk Shared\acstart16.exe

O4 - Global Startup: Utility Tray.lnk = C:\WINDOWS\system32\sistray.exe

O8 - Extra context menu item: E&xportar para o Microsoft Excel - res://C:\ARQUIV~1\MICROS~2\OFFICE11\EXCEL.EXE/3000

O9 - Extra button: Pesquisar - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\ARQUIV~1\MICROS~2\OFFICE11\REFIEBAR.DLL

O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Arquivos de programas\Messenger\msmsgs.exe

O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Arquivos de programas\Messenger\msmsgs.exe

O14 - IERESET.INF: SEARCH_PAGE_URL=&http://home.microsoft.com/intl/br/access/allinone.asp

O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedC...n/bin/cabsa.cab

O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab

O17 - HKLM\System\CCS\Services\Tcpip\..\{537E7C28-7149-49F8-80E9-F477F12FB350}: NameServer = 200.204.0.10 200.204.0.138

O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\ARQUIV~1\MSNMES~1\msgrapp.dll" (file missing)

O23 - Service: Autodesk Licensing Service - Autodesk - C:\Arquivos de programas\Arquivos comuns\Autodesk Shared\Service\AdskScSrv.exe

O23 - Service: C-DillaCdaC11BA - Macrovision - C:\WINDOWS\system32\drivers\CDAC11BA.EXE