Hello, My EEEPC seem to encountered the above problem after I installed a codec pack from majorgeeks.com. After the installation was done, i tried to open my HDD and was prompted which program i want to use to open it, same thing happen when i tried to open my C drive. I run Avira antivirus and quarantined any detections made but problem still there. I downloaded HJT to scan and post log but cannot install, the prompt appear again. Anyone can assist me in this. Thank you. Sorry I didn't post the log files here they are: Logfile of HijackThis v1.99.1 Scan saved at 1:07:38 AM, on 9/1/2008 Platform: Windows XP SP3 (WinNT 5.01.2600) MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512) 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\Explorer.EXE C:\WINDOWS\system32\spoolsv.exe C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe C:\WINDOWS\system32\svchost.exe C:\WINDOWS\system32\igfxtray.exe C:\WINDOWS\system32\hkcmd.exe C:\WINDOWS\system32\igfxpers.exe C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe C:\WINDOWS\system32\wuauclt.exe C:\Documents and Settings\Riyanto\Desktop\HijackThis.exe O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_07\bin\ssv.dll O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file) O4 - HKLM\..\Run: [igfxtray] C:\WINDOWS\system32\igfxtray.exe O4 - HKLM\..\Run: [igfxhkcmd] C:\WINDOWS\system32\hkcmd.exe O4 - HKLM\..\Run: [igfxpers] C:\WINDOWS\system32\igfxpers.exe O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min O4 - HKCU\..\Run: [kava] C:\WINDOWS\system32\kavo.exe O4 - HKCU\..\Run: [kamsoft] C:\WINDOWS\system32\ckvo.exe O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~1\OFFICE11\EXCEL.EXE/3000 O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_07\bin\ssv.dll O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_07\bin\ssv.dll O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~1\OFFICE11\REFIEBAR.DLL O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing) O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing) O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL O20 - Winlogon Notify: dimsntfy - %SystemRoot%\System32\dimsntfy.dll (file missing) O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxdev.dll O23 - Service: Avira AntiVir Personal - Free Antivirus Scheduler (AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe O23 - Service: Avira AntiVir Personal - Free Antivirus Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe