Member Avatar for nico_latour

Hello,
I am new to this so I hope I have posted this in the right place...
I have just come back home after a few months aborad. PC propmpted me to download all latest windows updates on first boot.
Since that, I cannot access any windows websites like , hotmail.com or even windows update itself....
I have tried using other browser than IE (mozilla) and I get the same result.
Can anyone help ?
Thanks

Here is log file from hijackthis scan - in acse it helps someone:
Logfile of Trend Micro HijackThis v2.0.0 (BETA)
Scan saved at 20:45:34, on 25/12/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
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:\Program Files\Common Files\Symantec Shared\ccSvcHst.exe
C:\Program Files\Common Files\Symantec Shared\AppCore\AppSvc32.exe
C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Hewlett-Packard\HP Share-to-Web\hpgs2wnd.exe
C:\Program Files\Java\jre1.5.0_11\bin\jusched.exe
C:\Program Files\Hewlett-Packard\HP Share-to-Web\hpgs2wnf.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\Common Files\Symantec Shared\ccApp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Skype\Phone\Skype.exe
C:\Program Files\PeerGuardian2\pg2.exe
C:\Program Files\FinePixViewer\QuickDCF.exe
C:\Program Files\Google\Google Updater\GoogleUpdater.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hposol08.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpoevm08.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\Bin\hpoSTS08.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\nico & lorraine\Local Settings\Temporary Internet Files\Content.IE5\6P85AB89\HiJackThis_v2[1].exe
C:\Program Files\Java\jre1.5.0_11\bin\jucheck.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.bbc.co.uk/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar4.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\2.1.615.5858\swg.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar4.dll
O4 - HKLM\..\Run: [Share-to-Web Namespace Daemon] C:\Program Files\Hewlett-Packard\HP Share-to-Web\hpgs2wnd.exe
O4 - HKLM\..\Run: [REGSHAVE] C:\Program Files\REGSHAVE\REGSHAVE.EXE /AUTORUN
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.5.0_11\bin\jusched.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Common Files\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [osCheck] "C:\Program Files\Norton AntiVirus\osCheck.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Skype] "C:\Program Files\Skype\Phone\Skype.exe" /nosplash /minimized
O4 - HKCU\..\Run: [PeerGuardian] C:\Program Files\PeerGuardian2\pg2.exe
O4 - HKCU\..\Run: [AdobeUpdater] C:\Program Files\Common Files\Adobe\Updater5\AdobeUpdater.exe
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')
O4 - Global Startup: Exif Launcher.lnk = ?
O4 - Global Startup: Google Updater.lnk = C:\Program Files\Google\Google Updater\GoogleUpdater.exe
O4 - Global Startup: hp psc 2000 Series.lnk = C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
O4 - Global Startup: officejet 6100.lnk = ?
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.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
O15 - Trusted Zone: http://www.hotmail.com
O16 - DPF: {05CA9FB0-3E3E-4B36-BF41-0E3A5CAA8CD8} (Office Genuine Advantage Validation Tool) -
O16 - DPF: {4C39376E-FA9D-4349-BACC-D305C1750EF3} (EPUImageControl Class) -
O16 - DPF: {6A344D34-5231-452A-8A57-D064AC9B7862} (Symantec Download Manager) -
O17 - HKLM\System\CCS\Services\Tcpip\..\{4B5731F7-EAA2-4F8F-8F6F-043AE8A3B769}: NameServer =
O17 - HKLM\System\CS1\Services\Tcpip\..\{4B5731F7-EAA2-4F8F-8F6F-043AE8A3B769}: NameServer =
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: Automatic LiveUpdate Scheduler - Symantec Corporation - C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccSvcHst.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccSvcHst.exe
O23 - Service: Symantec Lic NetConnect service (CLTNetCnService) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccSvcHst.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Symantec IS Password Validation (ISPwdSvc) - Symantec Corporation - C:\Program Files\Norton AntiVirus\isPwdSvc.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~1.EXE
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\System32\HPZipm12.exe
O23 - Service: Symantec Core LC - Unknown owner - C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: Symantec AppCore Service (SymAppCore) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\AppCore\AppSvc32.exe

--
End of file - 7565 bytes

  • 4 Contributors
  • 6 Replies
  • 388 Views
  • 8 Months Discussion Span
  • Latest Post Latest Post by Frank Wallis

Dani AI

Generated

Good catch by — a router-side MTU / Path MTU Discovery (PMTUD) problem is a common cause when certain sites (Windows Update, Hotmail, MSN) fail while others work. PMTUD depends on routers forwarding ICMP "Fragmentation Needed" messages; if a router advertises the wrong MTU or drops those ICMP messages, TLS/HTTP sessions can hang rather than fragment, which explains site-specific failures. Other possible contributors seen in the thread were Windows validation (as suggested), local IP‑blocking tools (PeerGuardian2 appears in the HijackThis log), and proxy/hosts misconfiguration.

A simple, reliable check on Windows XP is to use ping with the "don't fragment" flag and vary the payload size. Example:

ping -f -l 1472 www.microsoft.com

Explanation: IPv4 adds about 28 bytes of IP+ICMP header, so 1472 + 28 = 1500 (standard MTU). If the ping returns "Packet needs to be fragmented" then reduce the -l value (try 1464 for PPPoE 1492, or drop by 10 bytes repeatedly) until it succeeds; the MTU equals the largest successful payload plus 28. If small payloads succeed but larger ones fail, PMTUD/MTU is the likely culprit.

Practical remedies that follow from the diagnosis: update router firmware (the fix in this thread), set a conservative MTU on the router (1492 for PPPoE, 1500 for native Ethernet; try 1400 as a safe test), enable MSS clamping on the router if available, and make sure the router/firewall allows ICMP Type 3 Code 4 ("Fragmentation Needed"). Temporarily disable host-side blockers (firewall, PeerGuardian) and test again. Back up router configuration before flashing firmware or changing settings and only use official firmware. If the router cannot be fixed, adjust the host NIC MTU via the NIC driver or vendor tools as a workaround, and use packet capture (Wireshark) to confirm ICMP "fragmentation needed" messages for deeper analysis.

If problems persist after MTU fixes, follow 's suggestion to check Windows Genuine/validation status, verify DNS and hosts file entries, and review the router’s logs for blocked ICMP or malformed packets.

Recommended Answers

All 6 Replies

Member Avatar for TechTJ

Hello.

I ran into this same issue after I got some updates on an older dell I had. I was told to run the windows validation tool. Its available from Microsoft. I also had the problem on a computer that was given to me from a friend, it had a bad version of windows and they said it wasent valid. Because of that i wasent able to check my hotmail or any Microsoft websites. I would check for the windows validation tool. Let me know if this helps

Best Regards
Tim

Member Avatar for nico_latour

Thanks TechTJ, I have just sorted the problem. In this case it was an issue with my router (Belkin G+ Mimo ADSL2) which for some reason did not use the correct MTU.
Had to download an update firmware update from Belkin and all is back in order.
Thanks

Member Avatar for TechTJ

Im Glad to hear that.

Best Regards
Tim

Member Avatar for cakka

Have try with Restore Point ?
Maybe it can help you :)
Some times i getting a failure in my Windows pdate and that is be a solutions ;)

Nice

Member Avatar for Frank Wallis

Most probably when you updated your Computer,the Router which was connected to it
could not recognize it since the updates change the security options and other features of
your Operating Systems and for that you had to update the firmware of the Router so that
the firmware could know the new updated settings of your Operating System.

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