non sono riuscito a scaricare il fix della symantec. (non e' fix.reg che hai linkato tu no?)
Comunque ho trovato un modo per eliminare il virus su un forum brasiliano... almeno credo, da qualche minuto non appare piu' l'avviso di avg!

Posto il nuovo log, cosi' se e' vero che il problema e' risolto condivido con tutti la soluzione.
Logfile of HijackThis v1.99.1
Scan saved at 23.59.54, on 23/10/2006
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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:\WINDOWS\System32\rundll32.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
C:\WINDOWS\System32\RunDll32.exe
C:\Programmi\Java\j2re1.4.2_02\bin\jusched.exe
C:\Programmi\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_FATIA CE.EXE
C:\Programmi\Creative\MediaSource\Detector\CTDetec t.exe
C:\Programmi\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\Programmi\Microsoft ActiveSync\WCESCOMM.EXE
C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
C:\WINDOWS\System32\CTsvcCDA.EXE
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\File comuni\Ulead Systems\DVD\ULCDRSvr.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Nebbia.ANDREA-ZYYBFE60\Desktop\antivirus\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Int ernet Settings,ProxyOverride = 127.0.0.1
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - Default URLSearchHook is missing
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [CnxTrApp] rundll32.exe "C:\Programmi\StarModem\StarModem USB Network\CnxTrApp.dll",AppEntry -REG "Conexant\Conexant USB Network"
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [AVG7_EMC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
O4 - HKLM\..\Run: [Collegamento alla pagina delle proprietà di High Definition Audio] HDAudPropShortcut.exe
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\j2re1.4.2_02\bin\jusched.exe
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [EPSON Stylus DX3800 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_FATIA CE.EXE /P26 "EPSON Stylus DX3800 Series" /O6 "USB001" /M "Stylus DX3800"
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Programmi\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKCU\..\Run: [EPSON Stylus DX3800 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_FATIA CE.EXE /P26 "EPSON Stylus DX3800 Series" /M "Stylus DX3800" /EF "HKCU"
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Creative Detector] C:\Programmi\Creative\MediaSource\Detector\CTDetec t.exe /R
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Programmi\Microsoft ActiveSync\WCESCOMM.EXE"
O4 - HKCU\..\Run: [Skype] "I:\Programmi vari\Phone\Skype.exe" /nosplash /minimized
O4 - HKCU\..\Run: [msnmsgr] "C:\Programmi\MSN Messenger\msnmsgr.exe" /background
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office\OSA9.EXE
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\System32\msjava.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\System32\msjava.dll
O9 - Extra button: Crea preferiti portatile - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\Programmi\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Programmi\Microsoft ActiveSync\inetrepl.dll
O9 - Extra 'Tools' menuitem: Crea preferiti portatile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Programmi\Microsoft ActiveSync\inetrepl.dll
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - http://www.kaspersky.com/kos/eng/par...an_unicode.cab
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://download.bitdefender.com/reso...an8/oscan8.cab
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/S.../bin/cabsa.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/actives...ree/asinst.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: AVG Anti-Spyware Guard - Anti-Malware Development a.s. - C:\Programmi\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\System32\CTsvcCDA.EXE
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: MicroSoft Media Tools - Unknown owner - C:\WINDOWS\MSmedia.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Ulead Burning Helper (UleadBurningHelper) - Ulead Systems, Inc. - C:\Programmi\File comuni\Ulead Systems\DVD\ULCDRSvr.exe