MegaLab.it

ciao a tutti nel ctrl+alt+canc mi è comparso questo
C:\WINDOWS\system32\hldrrr.exe
sono stata contagiata da bagle??

C'è un 'anima buona che può seguire un'imbranata come me per eliminarlo?
grazie in anticipo...

Sì, direi che è proprio Bagle!
Dovrebbe essere removibile con hijackthis...
Comiuncia a dare un'occhiata alla guida specifica in attesa che arrivino amantide e crazy.cat
http://www.MegaLab.it/2657

grazie di aver letto il mio piccolo messaggio.....


ho letto la guida..e intanto mi sono scaricata gmer e the avenger...ok?
che dici ho fatto bene? (jack o come si chiama non lo trovo..))

biob ha scritto:jack o come si chiama non lo trovo

HijackThis

Il link è comunque presente anche in quello indicato da Mr.TFM

Hijackthis è impotente contro Bagle

Vedi se riesci a risolvere da sola, seguendo la guida, altrimenti puoi chiedere i chiarimenti qui.

Ho letto la guida, ma non ci capisco niente. Cosa devo cancellare??

biob ha scritto: Cosa devo cancellare??

Se non mi fai vedere almeno il log Autostart fatto con Gmer come lo faccio a sapere?

GMER 1.0.12.12086 - http://www.gmer.net
Autostart scan 2007-03-20 19:41:27
Windows 5.1.2600 Service Pack 2


HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\SubSystems@Windows = %SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,3072,512 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ProfileControl=Off MaxRequestThreads=16

HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon@Userinit = C:\WINDOWS\system32\userinit.exe,

HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\ >>>
AtiExtEvent@DLLName = Ati2evxx.dll
WgaLogon@DLLName = WgaLogon.dll

HKLM\SYSTEM\CurrentControlSet\Services\ >>>
ATI Smart /*ATI Smart*/@ = C:\WINDOWS\system32\ati2sgag.exe
rgsystctl /*Controllo Registro Sistema*/@ = C:\WINDOWS\Downlo~1\bcx4h\dtj89x.exe
ScsiPort@ = %SystemRoot%\system32\drivers\scsiport.sys
Spooler /*Spooler di stampa*/@ = %SystemRoot%\system32\spoolsv.exe
Utilità di pianificazione di LiveUpdate automatico /*Utilità di pianificazione di LiveUpdate automatico*/@ = "C:\Programmi\Symantec\LiveUpdate\ALUSchedulerSvc.exe" /*file not found*/

HKLM\Software\Microsoft\Windows\CurrentVersion\Run >>>
@NeroFilterCheckC:\WINDOWS\system32\NeroCheck.exe = C:\WINDOWS\system32\NeroCheck.exe
@CloneCDTray"C:\Programmi\SlySoft\CloneCD\CloneCDTray.exe" /s = "C:\Programmi\SlySoft\CloneCD\CloneCDTray.exe" /s
@QuickTime Task"C:\Programmi\QuickTime\qttask.exe" -atboottime = "C:\Programmi\QuickTime\qttask.exe" -atboottime
@MP10_EnsureFileVerC:\WINDOWS\inf\unregmp2.exe /EnsureFileVersions = C:\WINDOWS\inf\unregmp2.exe /EnsureFileVersions
@hldrrrC:\WINDOWS\system32\hldrrr.exe = C:\WINDOWS\system32\hldrrr.exe
@KernelFaultCheck%systemroot%\system32\dumprep 0 -k = %systemroot%\system32\dumprep 0 -k

HKCU\Software\Microsoft\Windows\CurrentVersion\Run >>>
@CTFMON.EXEC:\WINDOWS\system32\ctfmon.exe = C:\WINDOWS\system32\ctfmon.exe
@hldrrrC:\WINDOWS\system32\hldrrr.exe = C:\WINDOWS\system32\hldrrr.exe
@german.exeC:\WINDOWS\system32\wintems.exe /*file not found*/ = C:\WINDOWS\system32\wintems.exe /*file not found*/
@drvsyskitC:\Documents and Settings\user\Dati applicazioni\hidires\hidr.exe = C:\Documents and Settings\user\Dati applicazioni\hidires\hidr.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad >>>
@UPnPMonitorC:\WINDOWS\system32\upnpui.dll = C:\WINDOWS\system32\upnpui.dll
@WPDShServiceObjC:\WINDOWS\system32\WPDShServiceObj.dll = C:\WINDOWS\system32\WPDShServiceObj.dll

HKLM\Software\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved >>>
@{42071714-76d4-11d1-8b24-00a0c9068ff3} /*Estensione panoramica video del Pannello di controllo*/deskpan.dll /*file not found*/ = deskpan.dll /*file not found*/
@{30D02401-6A81-11d0-8274-00C04FD5AE38} /*IE Search Band*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{32683183-48a0-441b-a342-7c2a440a9478} /*Media Band*/(null) =
@{E7E4BC40-E76A-11CE-A9BB-00AA004AE837} /*Shell DocObject Viewer*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{FBF23B40-E3F0-101B-8488-00AA003E56F8} /*InternetShortcut*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{3C374A40-BAE4-11CF-BF7D-00AA006946EE} /*Microsoft Url History Service*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{FF393560-C2A7-11CF-BFF4-444553540000} /*History*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{7BD29E00-76C1-11CF-9DD0-00A0C9034933} /*Temporary Internet Files*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{7BD29E01-76C1-11CF-9DD0-00A0C9034933} /*Temporary Internet Files*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{CFBFAE00-17A6-11D0-99CB-00C04FD64497} /*Microsoft Url Search Hook*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{3DC7A020-0ACD-11CF-A9BB-00AA004AE837} /*The Internet*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{871C5380-42A0-1069-A2EA-08002B30309D} /*Internet Name Space*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{BDEADF00-C265-11D0-BCED-00A0C90AB50F} /*Cartelle Web*/C:\PROGRA~1\FILECO~1\MICROS~1\WEBFOL~1\MSONSEXT.DLL = C:\PROGRA~1\FILECO~1\MICROS~1\WEBFOL~1\MSONSEXT.DLL
@{00020D75-0000-0000-C000-000000000046} /*Microsoft Office Outlook Desktop Icon Handler*/C:\PROGRA~1\MICROS~2\OFFICE11\MLSHEXT.DLL = C:\PROGRA~1\MICROS~2\OFFICE11\MLSHEXT.DLL
@{0006F045-0000-0000-C000-000000000046} /*Microsoft Office Outlook Custom Icon Handler*/C:\PROGRA~1\MICROS~2\OFFICE11\OLKFSTUB.DLL = C:\PROGRA~1\MICROS~2\OFFICE11\OLKFSTUB.DLL
@{42042206-2D85-11D3-8CFF-005004838597} /*Microsoft Office HTML Icon Handler*/C:\Programmi\Microsoft Office\OFFICE11\msohev.dll = C:\Programmi\Microsoft Office\OFFICE11\msohev.dll
@{596AB062-B4D2-4215-9F74-E9109B0A8153} /*Previous Versions Property Page*/C:\WINDOWS\System32\twext.dll = C:\WINDOWS\System32\twext.dll
@{9DB7A13C-F208-4981-8353-73CC61AE2783} /*Previous Versions*/C:\WINDOWS\System32\twext.dll = C:\WINDOWS\System32\twext.dll
@{692F0339-CBAA-47e6-B5B5-3B84DB604E87} /*Extensions Manager Folder*/C:\WINDOWS\system32\extmgr.dll = C:\WINDOWS\system32\extmgr.dll
@{416651E4-9C3C-11D9-8BDE-F66BAD1E3F3A} /*PhoneBrowser*/C:\Programmi\Nokia\Nokia PC Suite 6\PhoneBrowser.dll = C:\Programmi\Nokia\Nokia PC Suite 6\PhoneBrowser.dll
@{e57ce731-33e8-4c51-8354-bb4de9d215d1} /*Periferiche Plug and Play universali*/C:\WINDOWS\system32\upnpui.dll = C:\WINDOWS\system32\upnpui.dll
@{D9F81151-62CA-4858-B45E-82B3EC41A549} /*RExpCtxU*/(null) =
@{35786D3C-B075-49b9-88DD-029876E11C01} /*Portable Devices*/%SystemRoot%\system32\wpdshext.dll = %SystemRoot%\system32\wpdshext.dll
@{D6791A63-E7E2-4fee-BF52-5DED8E86E9B8} /*Portable Devices Menu*/%SystemRoot%\system32\wpdshext.dll = %SystemRoot%\system32\wpdshext.dll
@{FC9FB64A-1EB2-4CCF-AF5E-1A497A9B5C2D} /*Messenger Sharing Folders*/C:\Programmi\MSN Messenger\fsshext.8.1.0178.00.dll = C:\Programmi\MSN Messenger\fsshext.8.1.0178.00.dll
@{B41DB860-8EE4-11D2-9906-E49FADC173CA} /*WinRAR shell extension*/C:\Programmi\WinRAR\rarext.dll = C:\Programmi\WinRAR\rarext.dll
@{07C45BB1-4A8C-4642-A1F5-237E7215FF66} /*IE Microsoft BrowserBand*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{1C1EDB47-CE22-4bbb-B608-77B48F83C823} /*IE Fade Task*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{205D7A97-F16D-4691-86EF-F3075DCCA57D} /*IE Menu Desk Bar*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{3028902F-6374-48b2-8DC6-9725E775B926} /*IE AutoComplete*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{43886CD5-6529-41c4-A707-7B3C92C05E68} /*IE Navigation Bar*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{44C76ECD-F7FA-411c-9929-1B77BA77F524} /*IE Menu Site*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{4B78D326-D922-44f9-AF2A-07805C2A3560} /*IE Menu Band*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{6038EF75-ABFC-4e59-AB6F-12D397F6568D} /*IE Microsoft History AutoComplete List*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{6B4ECC4F-16D1-4474-94AB-5A763F2A54AE} /*IE Tracking Shell Menu*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{6CF48EF8-44CD-45d2-8832-A16EA016311B} /*IE IShellFolderBand*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{73CFD649-CD48-4fd8-A272-2070EA56526B} /*IE BandProxy*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{98FF6D4B-6387-4b0a-8FBD-C5C4BB17B4F8} /*IE MRU AutoComplete List*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{9A096BB5-9DC3-4D1C-8526-C3CBF991EA4E} /*IE RSS Feeder Folder*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{9D958C62-3954-4b44-8FAB-C4670C1DB4C2} /*IE Microsoft Shell Folder AutoComplete List*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{B31C5FAE-961F-415b-BAF0-E697A5178B94} /*IE Microsoft Multiple AutoComplete List Container*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{BC476F4C-D9D7-4100-8D4E-E043F6DEC409} /*Microsoft Browser Architecture*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{BFAD62EE-9D54-4b2a-BF3B-76F90697BD2A} /*IE Shell Rebar BandSite*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{E6EE9AAC-F76B-4947-8260-A9F136138E11} /*IE Shell Band Site Menu*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{F2CF5485-4E02-4f68-819C-B92DE9277049} /*&Links*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{F83DAC1C-9BB9-4f2b-B619-09819DA81B0E} /*IE Registry Tree Options Utility*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{FAC3CBF6-8697-43d0-BAB9-DCD1FCE19D75} /*IE User Assist*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{FDE7673D-2E19-4145-8376-BBD58C4BC7BA} /*IE Custom MRU AutoCompleted List*/C:\WINDOWS\system32\ieframe.dll = C:\WINDOWS\system32\ieframe.dll
@{B9E1D2CB-CCFF-4AA6-9579-D7A4754030EF} /*iTunes*/C:\Programmi\iTunes\iTunesMiniPlayer.dll = C:\Programmi\iTunes\iTunesMiniPlayer.dll
@{D25B2CAB-8A9A-4517-A9B2-CB5F68A5A802} /*Adobe.Acrobat.ContextMenu*/C:\Programmi\Adobe\Acrobat 7.0\Acrobat Elements\ContextMenu.dll = C:\Programmi\Adobe\Acrobat 7.0\Acrobat Elements\ContextMenu.dll

HKCU\Software\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved@{BDEADF00-C265-11d0-BCED-00A0C90AB50F} /*Cartelle Web*/ = C:\PROGRA~1\FILECO~1\MICROS~1\WEBFOL~1\MSONSEXT.DLL

HKLM\Software\Classes\*\shellex\ContextMenuHandlers\ >>>
Adobe.Acrobat.ContextMenu@{D25B2CAB-8A9A-4517-A9B2-CB5F68A5A802} = C:\Programmi\Adobe\Acrobat 7.0\Acrobat Elements\ContextMenu.dll
WinRAR@{B41DB860-8EE4-11D2-9906-E49FADC173CA} = C:\Programmi\WinRAR\rarext.dll

HKLM\Software\Classes\Directory\shellex\ContextMenuHandlers\WinRAR@{B41DB860-8EE4-11D2-9906-E49FADC173CA} = C:\Programmi\WinRAR\rarext.dll

HKLM\Software\Classes\Folder\shellex\ContextMenuHandlers\WinRAR@{B41DB860-8EE4-11D2-9906-E49FADC173CA} = C:\Programmi\WinRAR\rarext.dll

HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects >>>
@{06849E9F-C8D7-4D59-B87D-784B7D6BE0B3}C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll = C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
@{761497BB-D6F0-462C-B6EB-D4DAF1D92D43}C:\Programmi\Java\jre1.5.0_10\bin\ssv.dll = C:\Programmi\Java\jre1.5.0_10\bin\ssv.dll
@{9030D464-4C02-4ABF-8ECC-5164760863C6}C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll = C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
@{AE7CD045-E861-484f-8273-0445EE161910}C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll = C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll

HKLM\Software\Microsoft\Internet Explorer\Main >>>
@Default_Page_URLhttp://go.microsoft.com/fwlink/?LinkId=69157 = http://go.microsoft.com/fwlink/?LinkId=69157
@Start Pagehttp://go.microsoft.com/fwlink/?LinkId=69157 = http://go.microsoft.com/fwlink/?LinkId=69157

HKCU\Software\Microsoft\Internet Explorer\Main@Start Page = http://www.alice.it/oggi/index.html

HKLM\Software\Classes\PROTOCOLS\Filter\text/xml@CLSID = C:\Programmi\File comuni\Microsoft Shared\OFFICE11\MSOXMLMF.DLL

HKLM\Software\Classes\PROTOCOLS\Handler\ >>>
dvd@CLSID = C:\WINDOWS\system32\msvidctl.dll
its@CLSID = C:\WINDOWS\System32\itss.dll
livecall@CLSID = C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
mhtml@CLSID = %SystemRoot%\System32\inetcomm.dll
ms-its@CLSID = C:\WINDOWS\System32\itss.dll
msnim@CLSID = C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
mso-offdap@CLSID = C:\PROGRA~1\FILECO~1\MICROS~1\WEBCOM~1\10\OWC10.DLL
mso-offdap11@CLSID = C:\PROGRA~1\FILECO~1\MICROS~1\WEBCOM~1\11\OWC11.DLL
tv@CLSID = C:\WINDOWS\system32\msvidctl.dll
wia@CLSID = C:\WINDOWS\System32\wiascr.dll

HKLM\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\NameSpace_Catalog5\Catalog_Entries\000000000004@LibraryPath = %SystemRoot%\system32\wshbth.dll

C:\Documents and Settings\All Users\Menu Avvio\Programmi\Esecuzione automatica >>>
Adobe Gamma Loader.lnk = Adobe Gamma Loader.lnk
Avvio veloce di Adobe Acrobat.lnk = Avvio veloce di Adobe Acrobat.lnk
HP Digital Imaging Monitor.lnk = HP Digital Imaging Monitor.lnk

---- EOF - GMER 1.0.12 ----


ti prego dimmi che è quello giusto.....

Si si, il log è quello giusto

Scarica The Avenger, estrai archivio in una cartella ed avvia il file Avenger.exe.
Seleziona l'opzione Input Script Manually, clicca sulla lente di ingrandimento e all'interno del form copia ed incolla questo script:

Files to delete:
C:\Documents and Settings\user\Dati applicazioni\hidires\m_hook.sys
C:\Documents and Settings\user\Dati applicazioni\hidires\hidr.exe
C:\WINDOWS\system32\wintems.exe
C:\WINDOWS\system32\hldrrr.exe
C:\WINDOWS\Downlo~1\bcx4h\dtj89x.exe

folders to delete:
C:\Documents and Settings\user\Dati applicazioni\hidires
C:\WINDOWS\exefld

registry keys to delete:
HKLM\SYSTEM\CurrentControlSet\Services\m_hook
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_M_HOOK
HKLM\SYSTEM\CurrentControlSet\Services\rgsystctl

registry values to delete:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run | hldrrr

Dopodichè clicca sul pulsante Done, poi 2 volte sull'icona del semaforo verde e rispondi alle successive domande Si .
Il pc dovrebbe riavviarsi da solo,se cosi non fosse riavvialo manualmente.
Alla fine allegami il log di Avenger che si trova in C:/avenger.txt

Per rimuovere i residui e ripristinare i servizi terminati da Bagle segui le istruzioni della guida linkata prima.

Logfile of The Avenger version 1, by Swandog46
Running from registry key:
\Registry\Machine\System\CurrentControlSet\Services\dwcaddom

*******************

Script file located at: \??\C:\WINDOWS\system32\ixdmafbh.txt
Script file opened successfully.

Script file read successfully

Backups directory opened successfully at C:\Avenger

*******************

Beginning to process script file:

File C:\Documents and Settings\user\Dati applicazioni\hidires\m_hook.sys deleted successfully.
File C:\Documents and Settings\user\Dati applicazioni\hidires\hidr.exe deleted successfully.


File C:\WINDOWS\system32\wintems.exe not found!
Deletion of file C:\WINDOWS\system32\wintems.exe failed!

Could not process line:
C:\WINDOWS\system32\wintems.exe
Status: 0xc0000034

File C:\WINDOWS\system32\hldrrr.exe deleted successfully.
File C:\WINDOWS\Downlo~1\bcx4h\dtj89x.exe deleted successfully.
Folder C:\Documents and Settings\user\Dati applicazioni\hidires deleted successfully.
Folder C:\WINDOWS\exefld deleted successfully.
Registry key HKLM\SYSTEM\CurrentControlSet\Services\m_hook deleted successfully.
Registry key HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_M_HOOK deleted successfully.
Registry key HKLM\SYSTEM\CurrentControlSet\Services\rgsystctl deleted successfully.
Registry value HKLM\Software\Microsoft\Windows\CurrentVersion\Run|hldrrr deleted successfully.

Completed script processing.

*******************

Finished! Terminate.

ecco sono riuscita a cliccare solo 1 volta sul semaforo però....
poi è comparsa la finestra e ho risposto si.. e il pc si è riavviato

secondo il tuo parere sono disinfettata?

biob ha scritto:secondo il tuo parere sono disinfettata?

Al 99%
Ora reinstalla l'antivirus, 'sta volta però uno diverso da Norton, e fai la scansione completa del sistema.
Ti consiglio Active Virus Shield o Antivir PE, entrambi gratuiti.

P.S. Non dimenticare di leggere la pagina Cenni finali di questo articolo.

ho ripulito file temporanei e reg con cc cleaner
ma levami 1 curiosità ho appena acquistato internet security
come è ? fa schif

biob ha scritto:ma levami 1 curiosità ho appena acquistato internet security
come è ? fa schif

Ehm... tanto buono non è... spero almeno che sia NIS 2007 e non NIS 2006, perlomeno è più leggero del secondo "mattone".

E' nis 2007....che faccio? lo butto?e se proprio devo scegliere tra i due che mi hai cons quale prendo?

lascia comunque ringraziarti per tutto il tempo che mi hai dedicato..sei stata semplicemente ...


G A L A T T I C A A A A A


CIAOOOOO

Oddio, visto che hai appena speso i soldi per il NIS 2007 non me la sento di essere categorica consigliandoti di cambiare antivirus
Comunque, guarda... intanto installa uno di quei 2 antivirus (sono buoni entrambi), fai la scansione e vedi come ti trovi. Al limite dopo potrai disinstallarlo e rimettere NIS.