slow computer

about a month ago, computer started going very slow. i am new to this, so i followed some of the forums about running hijack this and then posting to one of these forums, my log has lots of missing files. also hijack this started with a message saying "system denied write access to the hosts file..." here is my log file: please help if you can, thanks in advance!

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 9:09:22 PM, on 4/20/2011
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v9.00 (9.00.8112.16421)
Boot mode: Normal

Running processes:
C:\Windows\System32\spool\drivers\x64\3\WrtMon.exe
C:\Windows\System32\spool\drivers\x64\3\WrtProc.exe
C:\Program Files (x86)\Lavasoft\Ad-Aware\AAWTray.exe
C:\Program Files (x86)\Internet Explorer\IELowutil.exe
C:\Program Files (x86)\internet explorer\iexplore.exe
C:\Program Files (x86)\internet explorer\iexplore.exe
C:\Windows\SysWOW64\Macromed\Flash\FlashUtil10p_ActiveX.exe
C:\Program Files (x86)\Trend Micro\HiJackThis\HiJackThis.exe
C:\Program Files (x86)\internet explorer\iexplore.exe
C:\Program Files (x86)\GhosteryIEplugin\GhosteryRegistryProxy.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = Preserve
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
F2 - REG:system.ini: UserInit=userinit.exe
O4 - HKLM\..\RunOnce: [Launcher] C:\Program Files (x86)\Dell DataSafe Local Backup\Components\scheduler\Launcher.exe
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O4 - .DEFAULT User Startup: Dell Dock First Run.lnk = C:\Program Files\Dell\DellDock\DellDock.exe (User 'Default user')
O4 - Startup: Dell Dock.lnk = C:\Program Files\Dell\DellDock\DellDock.exe
O9 - Extra button: @C:\Program Files (x86)\Windows Live\Writer\WindowsLiveWriterShortcuts.dll,-1004 - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files (x86)\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: @C:\Program Files (x86)\Windows Live\Writer\WindowsLiveWriterShortcuts.dll,-1003 - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files (x86)\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Ghostery - {237EB6DA-3FEA-4DD2-8A61-A901B5C489D7} - C:\Program Files (x86)\GhosteryIEplugin\GhosteryBrowserHelperObjec.dll
O9 - Extra button: Send to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~2\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: S&end to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~2\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: Skype add-on for Internet Explorer - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files (x86)\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra 'Tools' menuitem: Skype add-on for Internet Explorer - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files (x86)\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~2\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Program Files (x86)\Spybot - Search & Destroy\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search && Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Program Files (x86)\Spybot - Search & Destroy\SDHelper.dll
O10 - Unknown file in Winsock LSP: c:\program files (x86)\common files\microsoft shared\windows live\wlidnsp.dll
O10 - Unknown file in Winsock LSP: c:\program files (x86)\common files\microsoft shared\windows live\wlidnsp.dll
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O16 - DPF: {10000000-1000-1000-1000-100000000000} - http://cdn.betteradvertising.com/ghostery/addons/ie/WebInstall/ghostery.cab
O16 - DPF: {3860DD98-0549-4D50-AA72-5D17D200EE10} (Windows Live OneCare safety scanner control) - http://cdn.scan.onecare.live.com/resource/download/scanner/en-us/wlscctrl2.cab
O16 - DPF: {6C269571-C6D7-4818-BCA4-32A035E8C884} (Creative Software AutoUpdate) - http://ccfiles.creative.com/Web/softwareupdate/su/ocx/15101/CTSUEng.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O16 - DPF: {F6ACF75C-C32C-447B-9BEF-46B766368D29} (Creative Software AutoUpdate Support Package) - http://ccfiles.creative.com/Web/softwareupdate/su/ocx/15112/CTPID.cab
O18 - Protocol: skype-ie-addon-data - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Program Files (x86)\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~2\COMMON~1\Skype\SKYPE4~1.DLL
O18 - Protocol: wlpg - {E43EF6CD-A37A-4A9B-9E6F-83F89B8E6324} - C:\Program Files (x86)\Windows Live\Photo Gallery\AlbumDownloadProtocolHandler.dll
O18 - Filter hijack: text/html - {4459DC76-1FDE-4B16-BAD0-E4F8E7647555} - C:\Program Files (x86)\GhosteryIEplugin\GhosteryMimeFilter.dll
O23 - Service: Andrea ST Filters Service (AESTFilters) - Andrea Electronics Corporation - C:\Windows\System32\DriverStore\FileRepository\stwrt64.inf_amd64_neutral_afc3018f8cfedd20\AESTSr64.exe
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing)
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files (x86)\Common Files\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: Bonjour Service - Apple Inc. - C:\Program Files (x86)\Bonjour\mDNSResponder.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files (x86)\Common Files\Symantec Shared\ccSvcHst.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files (x86)\Common Files\Symantec Shared\ccSvcHst.exe
O23 - Service: iSeries Access for Windows Remote Command (Cwbrxd) - IBM Corporation - C:\Windows\CWBRXD.EXE
O23 - Service: Dock Login Service (DockLoginService) - Stardock Corporation - C:\Program Files\Dell\DellDock\DockLogin.exe
O23 - Service: @%SystemRoot%\system32\efssvc.dll,-100 (EFS) - Unknown owner - C:\Windows\System32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\fxsresm.dll,-118 (Fax) - Unknown owner - C:\Windows\system32\fxssvc.exe (file missing)
O23 - Service: GoToAssist - Citrix Online, a division of Citrix Systems, Inc. - C:\Program Files (x86)\Citrix\GoToAssist\514\g2aservice.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft Limited - C:\Program Files (x86)\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~2\Symantec\LIVEUP~1\LUCOMS~1.EXE
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\Windows\System32\msdtc.exe (file missing)
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\psbase.dll,-300 (ProtectedStorage) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\Windows\system32\locator.exe (file missing)
O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: SoftThinks Agent Service (SftService) - SoftThinks SAS - C:\Program Files (x86)\Dell DataSafe Local Backup\sftservice.EXE
O23 - Service: Symantec Management Client (SmcService) - Symantec Corporation - C:\Program Files (x86)\Symantec\Symantec Endpoint Protection\Smc.exe
O23 - Service: @%SystemRoot%\system32\snmptrap.exe,-3 (SNMPTRAP) - Unknown owner - C:\Windows\System32\snmptrap.exe (file missing)
O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\Windows\System32\spoolsv.exe (file missing)
O23 - Service: @%SystemRoot%\system32\sppsvc.exe,-101 (sppsvc) - Unknown owner - C:\Windows\system32\sppsvc.exe (file missing)
O23 - Service: Audio Service (STacSV) - IDT, Inc. - C:\Windows\System32\DriverStore\FileRepository\stwrt64.inf_amd64_neutral_afc3018f8cfedd20\STacSV64.exe
O23 - Service: Symantec Endpoint Protection (Symantec AntiVirus) - Symantec Corporation - C:\Program Files (x86)\Symantec\Symantec Endpoint Protection\Rtvscan.exe
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\Windows\system32\UI0Detect.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vaultsvc.dll,-1003 (VaultSvc) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\Windows\System32\vds.exe (file missing)
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\Windows\system32\vssvc.exe (file missing)
O23 - Service: @%SystemRoot%\system32\Wat\WatUX.exe,-601 (WatAdminSvc) - Unknown owner - C:\Windows\system32\Wat\WatAdminSvc.exe (file missing)
O23 - Service: @%systemroot%\system32\wbengine.exe,-104 (wbengine) - Unknown owner - C:\Windows\system32\wbengine.exe (file missing)
O23 - Service: Dell Wireless WLAN Tray Service (wltrysvc) - Unknown owner - C:\Program Files\Dell\Dell Wireless WLAN Card\WLTRYSVC.EXE
O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\Windows\system32\wbem\WmiApSrv.exe (file missing)
O23 - Service: @%PROGRAMFILES%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - C:\Program Files (x86)\Windows Media Player\wmpnetwk.exe (file missing)

--
End of file - 10384 bytes

Hello and welcome to Bleeping Computer :welcome:

We apologize for the delay in responding to your request for help. Here at Bleeping Computer we get overwhelmed at times, and we are trying our best to keep up. Please note that your topic was not intentionally overlooked. Our mission is to help everyone in need, but sometimes it takes just a little longer to get to every request for help. No one is ignored here.

If you have since resolved the original problem you were having, we would appreciate you letting us know. If not please perform the following steps below so we can have a look at the current condition of your machine.

If you have not done so, include a clear description of the problems you're having, along with any steps you may have performed so far.

Upon completing the steps below another staff member will review your topic an do their best to resolve your issues.

If you have already posted a DDS log, please do so again, as your situation may have changed.
Use the 'Add Reply' and add the new log to this thread.

Thanks and again sorry for the delay.

We need to see some information about what is happening in your machine. Please perform the following scan:

Download DDS by sUBs from one of the following links. Save it to your desktop.
- DDS.scr
- DDS.pif
Double click on the DDS icon, allow it to run.
A small box will open, with an explaination about the tool. No input is needed, the scan is running.
Notepad will open with the results.
Follow the instructions that pop up for posting the results.
Close the program window, and delete the program from your desktop.

Please note: You may have to disable any script protection running if the scan fails to run. After downloading the tool, disconnect from the internet and disable all antivirus protection. Run the scan, enable your A/V and reconnect to the internet.

Information on A/V control HERE

We also need a new log from the GMER anti-rootkit scanner. Please first disable any CD emulation programs using the steps found in this topic:

Why we request you disable CD Emulation when receiving Malware Removal Advice

Then create another GMER log and post it as an attachment to the reply where you post your new DDS log. Instructions on how to properly create a GMER log can be found here:

How to create a GMER log

Elle