Ciao,
ho un problema con java. Probabilmente un virus ha aperto una finestra per l'aggiornamento che ha tolto java e non mi permette più di installarlo.

Allego log Grazie mille!!!

# AdwCleaner v3.010 - Report created 27/10/2013 at 16:42:57
# Updated 20/10/2013 by Xplode
# Operating System : Microsoft Windows XP Service Pack 2 (32 bits)
# Username : edo - ASUS
# Running from : C:\Documents and Settings\edo\Documenti\Downloads\adwcleaner.exe
# Option : Clean

***** [ Services ] *****

[x] Not Deleted : WsysSvc

***** [ Files / Folders ] *****

Folder Deleted : C:\Documents and Settings\All Users\Dati applicazioni\eSafe
Folder Deleted : C:\Programmi\MyPC Backup
Folder Deleted : C:\Documents and Settings\edo\Impostazioni locali\Dati applicazioni\lollipop
Folder Deleted : C:\DOCUME~1\edo\IMPOST~1\Temp\eIntaller
Folder Deleted : C:\Documents and Settings\edo\Dati applicazioni\DealPly
Folder Deleted : C:\Documents and Settings\edo\Documenti\optimizer pro
[!] Folder Deleted : C:\Documents and Settings\edo\Impostazioni locali\Dati applicazioni\Google\Chrome\User Data\Default\Extensions\cekcjpgehmohobmdiikfnopibipmgnml
File Deleted : C:\DOCUME~1\edo\IMPOST~1\Temp\Uninstall.exe
File Deleted : C:\Documents and Settings\edo\Impostazioni locali\Dati applicazioni\Google\Chrome\User Data\Default\Local Storage\chrome-extension_ojcgaoafcmbadjkfdippkdddgkeaipbn_0.localstorage-journal

***** [ Shortcuts ] *****

Shortcut Disinfected : C:\Documents and Settings\edo\Desktop\Google Chrome.lnk
Shortcut Disinfected : C:\Documents and Settings\All Users\Menu Avvio\Programmi\Google Chrome\Google Chrome.lnk
Shortcut Disinfected : C:\Documents and Settings\edo\Menu Avvio\Programmi\Internet Explorer.lnk
Shortcut Disinfected : C:\Documents and Settings\edo\Dati applicazioni\Microsoft\Internet Explorer\Quick Launch\Google Chrome.lnk

***** [ Registry ] *****

Key Deleted : HKLM\SOFTWARE\Google\Chrome\Extensions\cekcjpgehmohobmdiikfnopibipmgnml
Key Deleted : HKLM\SOFTWARE\Google\Chrome\Extensions\ifohbjbgfchkkfhphahclmkpgejiplfo
Key Deleted : HKLM\SYSTEM\CurrentControlSet\Services\Eventlog\Application\WsysSvc
Key Deleted : HKLM\SOFTWARE\Classes\CLSID\{1AA60054-57D9-4F99-9A55-D0FBFBE7ECD3}
Key Deleted : HKLM\SOFTWARE\Classes\Interface\{03E2A1F3-4402-4121-8B35-733216D61217}
Key Deleted : HKLM\SOFTWARE\Classes\Interface\{9E3B11F6-4179-4603-A71B-A55F4BCB0BEC}
Key Deleted : HKLM\SOFTWARE\Classes\TypeLib\{9C049BA6-EA47-4AC3-AED6-A66D8DC9E1D8}
Key Deleted : HKCU\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{95B7759C-8C7F-4BF1-B163-73684A933233}
Data Restored : HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\IEXPLORE.EXE\shell\open\command
Data Restored : HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\chrome.exe\shell\open\command
Key Deleted : HKCU\Software\lollipop
Key Deleted : HKCU\Software\Softonic
Key Deleted : HKCU\Software\AppDataLow\{1146AC44-2F03-4431-B4FD-889BC837521F}
Key Deleted : HKLM\Software\{1146AC44-2F03-4431-B4FD-889BC837521F}
Key Deleted : HKLM\Software\{6791A2F3-FC80-475C-A002-C014AF797E9C}
Key Deleted : HKLM\Software\eSafeSecControl
Key Deleted : HKLM\Software\qone8Software
Key Deleted : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WSysControl
Key Deleted : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\App Management\ARPCache\WSysControl

***** [ Browsers ] *****

-\\ Internet Explorer v6.0.2900.2180

Setting Restored : HKCU\Software\Microsoft\Internet Explorer\Main [Start Page]
Setting Restored : HKCU\Software\Microsoft\Internet Explorer\Main [Default_Page_URL]
Setting Restored : HKLM\SOFTWARE\Microsoft\Internet Explorer\Main [Default_Page_URL]
Setting Restored : HKLM\SOFTWARE\Microsoft\Internet Explorer\Main [Start Page]
Setting Restored : HKLM\SOFTWARE\Microsoft\Internet Explorer\Search [SearchAssistant]
Setting Restored : HKLM\SOFTWARE\Microsoft\Internet Explorer\Search [CustomizeSearch]

-\\ Google Chrome v30.0.1599.101

[ File : C:\Documents and Settings\edo\Impostazioni locali\Dati applicazioni\Google\Chrome\User Data\Default\preferences ]


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

AdwCleaner[R0].txt - [5263 octets] - [27/10/2013 16:40:59]
AdwCleaner[S0].txt - [4015 octets] - [27/10/2013 16:42:57]

########## EOF - C:\AdwCleaner\AdwCleaner[S0].txt - [4075 octets] ##########

Avevi della robaccia installata, dei dirottatori (lollipop), un nuovo motore di ricerca Qone8 e altri sw installati molto probabilmente da un aggiornameno di I.E.
Fai questa ricerca: vai in C:\Document and Setting\tuo nome, oppure Adminstrator\Impostazioni Locali\Dati applicazioni, controlla se ci sono ancora queste cartelle o file- MyPC Backup - lollipop-DealPly-optimizer pro-Qone8
se ci sono elimina tutto cartelle e file, poi controlla anche fra i motori di ricerca se c'è Qone8 e lo rimuovi.
Installa Malwarebytes,lo aggiorni e poi fai una scansione COMPLETA, non veloce, elimina quello che trova.
Vai QUI e scarica l'ultima vs. di Java.
Se non risolvi posta un log di HijackThis che controlliamo Ciao

Non mi fa ancora scaricare Java dice che un file è corrotto.

Ecco il log grazie:

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 21.27.05, on 27-ott-13
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\PROGRA~1\AVG\AVG2014\avgrsx.exe
C:\Programmi\AVG\AVG2014\avgcsrvx.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\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\khooker.exe
C:\WINDOWS\system32\SiSAudUt.exe
C:\Programmi\Hewlett-Packard\Toolbox2.0\Apache Tomcat 4.0\webapps\Toolbox\StatusClient\StatusClient.exe
C:\Programmi\HP\HP Software Update\HPWuSchd2.exe
C:\WINDOWS\system32\wltray.exe
C:\Programmi\AVG\AVG2014\avgui.exe
C:\Programmi\Nikon\PictureProject\NkbMonitor.exe
C:\Programmi\Nikon\NkView6\NkvMon.exe
C:\Programmi\AVG\AVG2014\avgidsagent.exe
C:\Programmi\AVG\AVG2014\avgwdsvc.exe
C:\Programmi\File comuni\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Programmi\Hewlett-Packard\Toolbox2.0\Javasoft\JRE\1.3.1\bin\javaw.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\HP\Digital Imaging\bin\hpqimzone.exe
C:\Programmi\AVG\AVG2014\avgnsx.exe
C:\Programmi\AVG\AVG2014\avgemcx.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Programmi\Google\Chrome\Application\chrome.exe
C:\Programmi\Google\Chrome\Application\chrome.exe
C:\Programmi\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\edo\Documenti\Downloads\chromeinstall-7u45 (4).exe
C:\Programmi\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\edo\Documenti\Downloads\SoftonicDownloader_per_hijackthis.exe
C:\Documents and Settings\edo\Desktop\HijackThis.exe

R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1;<local>
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O4 - HKLM\..\Run: [SiS KHooker] C:\WINDOWS\system32\khooker.exe
O4 - HKLM\..\Run: [SiS7012Utility] C:\WINDOWS\system32\SiSAudUt.exe -wdm
O4 - HKLM\..\Run: [StatusClient] C:\Programmi\Hewlett-Packard\Toolbox2.0\Apache Tomcat 4.0\webapps\Toolbox\StatusClient\StatusClient.exe /auto
O4 - HKLM\..\Run: [TomcatStartup] C:\Programmi\Hewlett-Packard\Toolbox2.0\hpbpsttp.exe
O4 - HKLM\..\Run: [HP Software Update] C:\Programmi\HP\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [wltray.exe] C:\WINDOWS\system32\wltray.exe
O4 - HKLM\..\Run: [AVG_UI] "C:\Programmi\AVG\AVG2014\avgui.exe" /TRAYONLY
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Global Startup: Avvio rapido di HP Image Zone.lnk = C:\Programmi\HP\Digital Imaging\bin\hpqthb08.exe
O4 - Global Startup: NkbMonitor.exe.lnk = C:\Programmi\Nikon\PictureProject\NkbMonitor.exe
O4 - Global Startup: NkvMon.exe.lnk = C:\Programmi\Nikon\NkView6\NkvMon.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1160900328421
O22 - SharedTaskScheduler: Precaricatore Browseui - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Daemon di cache delle categorie di componenti - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\system32\browseui.dll
O23 - Service: AVGIDSAgent - AVG Technologies CZ, s.r.o. - C:\Programmi\AVG\AVG2014\avgidsagent.exe
O23 - Service: AVG WatchDog (avgwd) - AVG Technologies CZ, s.r.o. - C:\Programmi\AVG\AVG2014\avgwdsvc.exe
O23 - Service: Servizio Google Update (gupdate) (gupdate) - Google Inc. - C:\Programmi\Google\Update\GoogleUpdate.exe
O23 - Service: Servizio Google Update (gupdatem) (gupdatem) - Google Inc. - C:\Programmi\Google\Update\GoogleUpdate.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: LiveShare P2P Server 9 (RoxLiveShare9) - Unknown owner - C:\Programmi\File comuni\Roxio Shared\9.0\SharedCOM\RoxLiveShare9.exe (file missing)
O23 - Service: stllssvr - Unknown owner - C:\Programmi\File comuni\SureThing Shared\stllssvr.exe (file missing)
O23 - Service: Broadcom Wireless LAN Tray Service (wltrysvc) - Unknown owner - C:\WINDOWS\System32\wltrysvc.exe
O23 - Service: ZyDAS1211BBG - Unknown owner - C:\Programmi\ZyDAS Technology Corporation\ZyDAS_802.11g_Utility\srvany.exe

--
End of file - 5496 bytes

Si,
avevo fatto tutto...il cd di questo computer non ce l'ho ma me lo potrei procurare da quelli che mi hanno dato il computer!

Adesso provo con queste grazie!