Ho provato con un CD riscrivibile masterizzando uno solo di quei files video. Con Nero sono arrivato al 100% ma poi la verifica finale non e' andata a buon fine Per cui dopo due tentativi con Nero sono passato ad Ashampoo e qui tutto e' filato per il verso giusto.
Quindi c'e da capire perche' Nero si blocca anche con file di piccole dimensioni. Ashampoo questa volta mi ha masterizzato ma anche qui resta da capire perche' la volta precedente si e' bloccato pure lui.

Ho ritentato col DVD ma si blocca Pero' i Cd li masterizza. Ad ogni modo provero' a pulire la lente. Tuttavia ho notato che il pc ultimamente e' rallentato parecchio, per cui non vorrei che questo centri qualcosa col processo di masterizzazione.
Per questo giusto per escludere tale ipotesi posto un log di hijackthis casomai ci fosse qualcosa da eliminare.

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 23.42.02, on 17/06/2013
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Unable to get Internet Explorer version!
Boot mode: Normal

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:\Program Files\Creative\Shared Files\CTAudSvc.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\CTHELPER.EXE
C:\Program Files\PC Tools Firewall Plus\FirewallGUI.exe
C:\Program Files\Real\RealPlayer\update\realsched.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Java\jre7\bin\jqs.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\PC Tools Firewall Plus\FWService.exe
C:\Program Files\RealNetworks\RealDownloader\rndlresolversvc.exe
C:\WINDOWS\system32\wscntfy.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Program Files\Trend Micro\HiJackThis\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://search.b1.org/?bsrc=hmior&chid=c167991
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.b1.org/?bsrc=hmior&chid=c167991
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = about:blank
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 = about:blank
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.tot.co.th/
O2 - BHO: RealNetworks Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Documents and Settings\All Users\Application Data\RealNetworks\RealDownloader\BrowserPlugins\IE\rndlbrowserrecordplugin.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre7\bin\ssv.dll
O2 - BHO: Guida per l'accesso a Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre7\bin\jp2ssv.dll
O2 - BHO: Shareiiit - {E7AB3DAE-5A7A-41A7-8258-BD60657392E2} - C:\Program Files\Shareiiit\ScriptHost.dll
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [PHIME2002ASync] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM\..\Run: [PHIME2002A] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE NvQTwk,NvCplDaemon initialize
O4 - HKLM\..\Run: [DisplayTrayIcon] C:\WINDOWS\system32\TrayIcon.exe
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [00PCTFW] "C:\Program Files\PC Tools Firewall Plus\FirewallGUI.exe" -s
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Real\RealPlayer\update\realsched.exe" -osboot
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Skype] "C:\Program Files\Skype\Phone\Skype.exe" /minimized /regrun
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'NETWORK SERVICE')
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')
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MI1933~1\Office10\EXCEL.EXE/3000
O9 - Extra button: Inserisci blog - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: Inserisci &blog in Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Shareiiit options - {38771E1F-85E0-4A3E-92D8-1D7E62C32719} - C:\Program Files\Shareiiit\ScriptHost.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O22 - SharedTaskScheduler: Browseui preloader - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Component Categories cache daemon - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\system32\browseui.dll
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\WINDOWS\system32\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: Creative Audio Engine Licensing Service - Creative Labs - C:\Program Files\Common Files\Creative Labs Shared\Service\CTAELicensing.exe
O23 - Service: Creative Audio Service (CTAudSvcService) - Creative Technology Ltd - C:\Program Files\Creative\Shared Files\CTAudSvc.exe
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Oracle Corporation - C:\Program Files\Java\jre7\bin\jqs.exe
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Program Files\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: PandoraService (PanService) - Unknown owner - C:\Program Files\PANDORA.TV\PanService\PandoraService.exe (file missing)
O23 - Service: PC Tools Firewall Plus (PCToolsFirewallPlus) - Unknown owner - C:\Program Files\PC Tools Firewall Plus\FWService.exe
O23 - Service: RealNetworks Downloader Resolver Service - Unknown owner - C:\Program Files\RealNetworks\RealDownloader\rndlresolversvc.exe
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files\Skype\Updater\Updater.exe

--
End of file - 7695 bytes

Salve! La lente non dev'essere necessariamente impolverata. Peraltro se si "ingrassa" manco te ne accorgi.

Tuttavia, prova con una live di Linux. Altra prova che farei,(se non è stata fatta) è il ripristino di configurazione, riportando il sistema

ad un data ove tutto funzionava.

Per il log, postalo nella sezione sicurezza. A mio parere, è un problema hardware.

Bye

---