Also when the internet connection window comes up, my username and saved password have been removed and have to be retyped each time. Sometimes my regular ISP connection has also been removed fom the drop-down list but it is back just now. This is the kind of erratic behaviour which makes me think I may have a virus, etc rather than a hardware fault but I really don't know a lot about computers.
I am currently using an old pc with the same modem and phone line and getting no problem and have done all the things you suggest that I am able to without being able to connect the original PC to the internet.
I'd be grateful if someone could advise me if this is a known malware type problem or what I can do to fix it. Thanks in advance. Meanwhile, here is a HijackThis Log:
Logfile of HijackThis v1.99.1
Scan saved at 20:22:47, on 11/07/2005
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
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\system32\crypserv.exe
C:\Program Files\Common Files\EPSON\EBAPI\SAgent2.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\hkcmd.exe
C:\Program Files\Java\j2re1.4.2_03\bin\jusched.exe
C:\Program Files\Dell\Media Experience\PCMService.exe
C:\Program Files\Intel\Modem Event Monitor\IntelMEM.exe
C:\WINDOWS\system32\dla\tfswctrl.exe
C:\Program Files\ZyXEL\ADSL USB Modem\CnxDslTb.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S10IC2.EXE
C:\PROGRA~1\TEXTBR~1.0\Bin\INSTAN~1.EXE
C:\Program Files\Messenger Plus! 3\MsgPlus.exe
C:\WINDOWS\avsoft.exe
C:\WINDOWS\system32\xetlmitg.exe
C:\WINDOWS\system32\pbibm.exe
C:\WINDOWS\avsoft.exe
C:\Program Files\HijackThis.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.dell.co.uk/myway
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.co.uk/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.dell.co.uk/myway
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.dell.co.uk/myway
O2 - BHO: Yahoo! Companion BHO - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\PROGRA~1\Yahoo!\COMPAN~1\Installs\cpn\ycomp5_3_12_0.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
O3 - Toolbar: (no name) - {BA52B914-B692-46c4-B683-905236F6F655} - (no file)
O3 - Toolbar: &Yahoo! Companion - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\Yahoo!\COMPAN~1\Installs\cpn\ycomp5_3_12_0.dll
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\j2re1.4.2_03\bin\jusched.exe
O4 - HKLM\..\Run: [PCMService] "C:\Program Files\Dell\Media Experience\PCMService.exe"
O4 - HKLM\..\Run: [IntelMeM] C:\Program Files\Intel\Modem Event Monitor\IntelMEM.exe
O4 - HKLM\..\Run: [dla] C:\WINDOWS\system32\dla\tfswctrl.exe
O4 - HKLM\..\Run: [UpdateManager] "C:\Program Files\Common Files\Sonic\Update Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [CnxDslTaskBar] "C:\Program Files\ZyXEL\ADSL USB Modem\CnxDslTb.exe"
O4 - HKLM\..\Run: [EPSON Stylus C42 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S10IC2.EXE /P23 "EPSON Stylus C42 Series" /O6 "USB001" /M "Stylus C42"
O4 - HKLM\..\Run: [InstantAccess] C:\PROGRA~1\TEXTBR~1.0\Bin\INSTAN~1.EXE /h
O4 - HKLM\..\Run: [RegisterDropHandler] C:\PROGRA~1\TEXTBR~1.0\Bin\REGIST~1.EXE
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Program Files\Messenger Plus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [antivirus] C:\WINDOWS\avsoft.exe /i
O4 - HKLM\..\Run: [HDAudio Driver 1.0] C:\WINDOWS\system32\xetlmitg.exe
O4 - HKLM\..\Run: [HDAudio Driver 2.0] C:\WINDOWS\system32\pbibm.exe
O4 - HKLM\..\RunServices: [RegisterDropHandler] C:\PROGRA~1\TEXTBR~1.0\Bin\REGIST~1.EXE
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_03\bin\npjpi142_03.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_03\bin\npjpi142_03.dll
O9 - Extra button: Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\Program Files\Yahoo!\Messenger\yhexbmes0527.dll
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\Program Files\Yahoo!\Messenger\yhexbmes0527.dll
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\system32\Shdocvw.dll
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
O16 - DPF: {4D7F48C0-CB49-4EA6-97D4-04F4EACC2F3B} (InstallShield Setup Player 2K2) - http://sib1.od2.com/...2/OCI/setup.exe
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn...pDownloader.cab
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O23 - Service: Crypkey License - Kenonic Controls Ltd. - C:\WINDOWS\SYSTEM32\crypserv.exe
O23 - Service: EPSON Printer Status Agent2 (EPSONStatusAgent2) - SEIKO EPSON CORPORATION - C:\Program Files\Common Files\EPSON\EBAPI\SAgent2.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\PROGRA~1\COMMON~1\SONYSH~1\AVLib\Sptisrv.exe