ciao a tutti scrivo a nome di mia cugina che ha diversi problemi ancora sul pc con window 7
dopo aver disinstallato il vecchio antivirus norton ha provato ad installare avg senza successo e poi avira ma pare non funzionare a dovere. poi ogni volta che va in internet si apre questa fastidiosa pagina kozanekozasearchsystem.com
dopo varie peripezie e' riuscita ad installare MSE e fare le scansioni ha tolto i vari virus poi ha usato malwarebytes in modo completo e ha tolto altre porcherie....

quando in "c"- programmi - tenta di togliere le cartelle dei vecchi antivirus esce questo msg:

Impossibile eliminare la cartella.Errore imprevisto.Se l'errore persiste,è possibile utilizzare il codice errore per cercare informazioni sul problema.Errore 0x80070091:la directory non è vuota.

vi posto il log di hijackthis del giorno 5-12-2011

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 10:17:05, on 05/12/2011
Platform: Windows 7 (WinNT 6.00.3504)
MSIE: Internet Explorer v8.00 (8.00.7600.16869)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskhost.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Windows\System32\igfxtray.exe
C:\Windows\System32\hkcmd.exe
C:\Windows\system32\igfxsrvc.exe
C:\Windows\System32\igfxpers.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Program Files\Logitech\LWS\Webcam Software\LWS.exe
C:\Program Files\Iminent\IMBooster\IMBooster.exe
C:\Program Files\HP\HP Software Update\hpwuschd2.exe
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
C:\Program Files\Logitech\LWS\Webcam Software\CameraHelperShell.exe
C:\Program Files\Common Files\Logishrd\LQCVFX\COCIManager.exe
C:\Program Files\Logitech\Vid HD\Vid.exe
C:\Program Files\DAEMON Tools Lite\DTLite.exe
C:\Program Files\Trend Micro\HiJackThis\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.crawler.com/search/dispatche ... p=aus&qkw=%s&tbid=60747
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.iminent.com/?appId=66C845 ... A098D567FA
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 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: PowerOffer - {3543619C-D563-43f7-95EA-4DA7E1CC396A} - C:\Users\Public\Documents\PowerOffer\PowerOfferBHO.dll
O2 - BHO: (no name) - {84FF7BD6-B47F-46F8-9130-01B2696B36CB} - (no file)
O2 - BHO: IMinent WebBooster - {A09AB6EB-31B5-454C-97EC-9B294D92EE2A} - C:\Program Files\Iminent\IMBooster4Web\Iminent.WebBooster.dll
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: Yontoo Layers - {FD72061E-9FDE-484D-A58A-0BAB4151CAD8} - C:\Program Files\Yontoo Layers Runtime\YontooIEClient.dll
O4 - HKLM\..\Run: [IgfxTray] C:\Windows\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\Windows\system32\hkcmd.exe
O4 - HKLM\..\Run: [Persistence] C:\Windows\system32\igfxpers.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [LWS] C:\Program Files\Logitech\LWS\Webcam Software\LWS.exe -hide
O4 - HKLM\..\Run: [IMBooster] C:\Program Files\Iminent\IMBooster\imbooster.exe /warmup
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\Hp\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [Malwarebytes' Anti-Malware (reboot)] "C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe" /runcleanupscript
O4 - HKCU\..\Run: [Google Update] "C:\Users\username\AppData\Local\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [Logitech Vid] "C:\Program Files\Logitech\Vid HD\Vid.exe" -bootmode
O4 - HKCU\..\Run: [Facebook Update] "C:\Users\username\AppData\Local\Facebook\Update\FacebookUpdate.exe" /c /nocrashserver
O4 - HKCU\..\Run: [DAEMON Tools Lite] "C:\Program Files\DAEMON Tools Lite\DTLite.exe" -autorun
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /autoRun (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-19\..\RunOnce: [mctadmin] C:\Windows\System32\mctadmin.exe (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /autoRun (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-20\..\RunOnce: [mctadmin] C:\Windows\System32\mctadmin.exe (User 'NETWORK SERVICE')
O8 - Extra context menu item: Cerca nel web - C:\Program Files\SweetIM\Toolbars\Internet Explorer\resources\menuext.html
O8 - Extra context menu item: Google Sidewiki... - res://C:\Program Files\Google\Google Toolbar\Component\GoogleToolbarDynamic_mui_en_7461B1589E8B4FB7.dll/cmsidewiki.html
O9 - Extra button: Click to call with Skype - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra 'Tools' menuitem: Click to call with Skype - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O18 - Protocol: skype-ie-addon-data - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O23 - Service: Avira AntiVir MailGuard (AntiVirMailService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\avmailc.exe
O23 - Service: Avira AntiVir Scheduler (AntiVirSchedulerService) - Unknown owner - C:\Program Files\Avira\AntiVir Desktop\sched.exe (file missing)
O23 - Service: Avira AntiVir Guard (AntiVirService) - Unknown owner - C:\Program Files\Avira\AntiVir Desktop\avguard.exe (file missing)
O23 - Service: Avira AntiVir WebGuard (AntiVirWebService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\AVWEBGRD.EXE
O23 - Service: Servizio di Google Update (gupdate) (gupdate) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Servizio Google Update (gupdatem) (gupdatem) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe

grazie anticipatamente

---

Disinstalla sweet im toolbar

Elimina questa cartella:
C:\Users\Public\Documents\PowerOffer

Fixa queste voci:
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.crawler.com/search/dispatche ... p=aus&qkw=%s&tbid=60747
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.iminent.com/?appId=66C845 ... A098D567FA
O2 - BHO: PowerOffer - {3543619C-D563-43f7-95EA-4DA7E1CC396A} - C:\Users\Public\Documents\PowerOffer\PowerOfferBHO.dll
O2 - BHO: (no name) - {84FF7BD6-B47F-46F8-9130-01B2696B36CB} - (no file)
O4 - HKCU\..\Run: [Facebook Update] "C:\Users\username\AppData\Local\Facebook\Update\FacebookUpdate.exe" /c /nocrashserver


Poi, scarica ed installa malwarebytes. aggiornalo ed esegui una scan completa. allega il report.

se non ti dispiace, gradirei vedere un log aggiornato di malwarebytes (scansione completa, mi raccomando!).