[Resolvido] Infestação de malwares: DealNoDeal, SalePlus e outros

Pessoal,

Estou com o note infestado de pragas. Quando abro o navegador, várias extensões são instaladas e por mais que eu as delete e as desinstale do note, não consigo me livrar delas, elas sempre voltam. O resultado é que em toda página aparecem propagandas no topo ou no meio da página e às vezes páginas são carregadas automaticamente (estou lendo um artigo, de repente saio do site e estou em uma outra página). Esses anúncios vem com o nome de "Ad by SalePlus" ou "Ad by DealNoDeal" dentre outros.

Obs.: quando rodei o Hijackthis, apareceu uma mensagem dizendo o seguinte:

"For some reasons the system denied write access to the Hosts file. If any hijacked domains are in this file, HijackThis may not be able to fix this. If that happens, you need to edit the file yourself. To do this, click Start, Run and type: notepad C:\WINDOWS\System32\drivers\etc\hosts and press enter. Find the line(s) HijackThis reports and delete them. Save this file as 'hosts' (with quotes) and reboot."

Segue log:

Logfile of Trend Micro HijackThis v2.0.5
Scan saved at 8:22:42 PM, on 2015-04-14
Platform: Unknown Windows (WinNT 6.02.1008)
MSIE: Internet Explorer v11.0 (11.00.9600.17416)

Boot mode: Normal

Running processes:
C:\PROGRA~2\GbPlugin\GbpSv.exe
C:\ProgramData\{ab512ab1-9c13-6b92-ab51-12ab19c1aac6}\Driver ToolKit 8.3 License Key Crack for Free download.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Users\Vi\Downloads\HijackThis.exe
C:\WINDOWS\SysWOW64\DllHost.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = about:Tabs
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 = C:\Windows\SysWOW64\blank.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
F2 - REG:system.ini: UserInit=userinit.exe,
O2 - BHO: G-Buster Browser Defense BANESE - {C41A1C0E-EA6C-11D4-B1B8-444553540027} - C:\Program Files (x86)\GbPlugin\gbiehbes.dll
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files (x86)\Adobe\Reader 10.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [sunJavaUpdateSched] "C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe"
O4 - HKLM\..\Policies\Explorer\Run: [btvStack] "C:\Program Files (x86)\Bluetooth Suite\BtvStack.exe"
O4 - Startup: Driver ToolKit 8.3 License Key Crack for Free download.lnk = C:\ProgramData\{ab512ab1-9c13-6b92-ab51-12ab19c1aac6}\Driver ToolKit 8.3 License Key Crack for Free download.exe
O4 - Startup: Driver Toolkit 8.4 Working License Key and Crack Free Download.lnk = C:\ProgramData\{4e410934-b586-2d1d-4e41-10934b5824d2}\Driver Toolkit 8.4 Working License Key and Crack Free Download.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~1\Office15\EXCEL.EXE/3000
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O15 - Trusted Zone: www.banese.b.br
O15 - Trusted Zone: wwws.banese.b.br
O15 - Trusted Zone: egov.banese.com.br
O15 - Trusted Zone: www.banese.com.br
O15 - Trusted Zone: wwws.banese.com.br
O15 - Trusted Zone: www.banesecard.com.br
O15 - Trusted Zone: portaldoservidor.se.gov.br
O18 - Protocol: osf - {D924BDC6-C83A-4BD5-90D0-095128A113D1} - C:\Program Files (x86)\Microsoft Office\Office15\MSOSB.DLL
O18 - Protocol: wlpg - {E43EF6CD-A37A-4A9B-9E6F-83F89B8E6324} - C:\Program Files (x86)\Windows Live\Photo Gallery\AlbumDownloadProtocolHandler.dll
O18 - Filter hijack: text/xml - {807583E5-5146-11D5-A672-00B0D022E945} - C:\Program Files (x86)\Common Files\Microsoft Shared\OFFICE15\MSOXMLMF.DLL
O20 - Winlogon Notify: GbPluginBes - C:\Program Files (x86)\GbPlugin\gbiehBes.dll
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\WINDOWS\System32\alg.exe (file missing)
O23 - Service: Easy Launcher - Samsung Electronics CO., LTD. - C:\Program Files (x86)\Samsung\Settings\CmdServer\EasyLauncher.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: Gbp Service (GbpSv) - GAS Tecnologia - C:\PROGRA~2\GbPlugin\GbpSv.exe
O23 - Service: @%SystemRoot%\system32\ieetwcollectorres.dll,-1000 (IEEtwCollectorService) - Unknown owner - C:\WINDOWS\system32\IEEtwCollector.exe (file missing)
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
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\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: @%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: @%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\wbengine.exe,-104 (wbengine) - Unknown owner - C:\WINDOWS\system32\wbengine.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-320 (WdNisSvc) - Unknown owner - C:\Program Files (x86)\Windows Defender\NisSrv.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-310 (WinDefend) - Unknown owner - C:\Program Files (x86)\Windows Defender\MsMpEng.exe (file missing)
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)

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End of file - 6405 bytes

Obrigado