Had a virus now cannot connect to net

Also Post info about the operating system and how you connect to the net (wired / wireless / usb dongle)

Apologies in advance for piggy backing on this thread!

Basically having the same problem as OP. Have Vista, running on
UPC wireless, in built wireless card on laptop. Other laptops,
phone and PS3 working as per normal. Hve AVG running. While
surfing got a pop up saying a trojan. After a while or maybe it
was next reboot the internet was dodgy, working only half the
time. That has now increased to 99% of the time. For some reason
it can work randomly for a period of a few minutes but more or
less does not work. Getting a DNS / Error 105 Cannot connect to
server problem. Neither mozilla, chrome or explorer work.

So after removing Trojan with AVG, was still having problems.
Then ran Malwarebytes, removed more stuff, internet worked! But
for a few hours only. Most of the bugs were found in the Local –
Temp folder for the internet.

Tried to reconfigure IP with cmd prompt. Changed some settings
for TCP/IP to automatic. System Restore wont complete for me.
Tried running a Winsock fix but that wont complete either,
getting an Error 53 or something. Got the CD that came with the
laptop, reinstalled the network drivers, or at least I think I
did, to no avail.

I took photos with my phone of ipconfig all, apologies for
quality, hope it can be made out. If anyone could shed some
light on the situation I’d be extremely grateful. Have just
received an external hard drive in the post today. Just going to
backup all my important information and attempt to restore
laptop to factory settings hoping that that’ll solve my problem.

Ok People I had this exact problem (well I think I did.. my laptop would connect to the network but not the internet)..

I posted up here for a solution but none came!!! I was a couple of seconds away from a full reboot but then I got a brain wave... AND IT WORKED

First off go into your adaptors properties and make sure neitehr IPV4 or IPV6 are set to static IP

Then what I did was go into control panal -> device manager -> Network Adapters -> Go to driver tab -> and disable the network adapter -> Now re-enable the adapter and restart your laptop

This might solve the problem. It worked for me, Iv had no problems in the last 5 months

Havent been able to get Eset onto my system yet. Gonna borrow a laptop the evening and run it I hope.

Had my internet up and running again for a while. Two other laptops werent working on system, so turned router off / on and re-entered the password, all of a sudden internet started working again, for me and the other two laptops. But since, the two laptops have continued to work, mine had stopped again. Works every so often but only for a short period at a time.

Got an AVG pop-up, removed something, now when i start up my system it tells me I'm missing the bit I removed from the registry, oops.

Also, the symbol in the bottom corner for the connection, keeps switching from with / without the globe, having local only and full internet access.

I ran CCleaner is safe mode and when logged on, cleared over a gig of stuff first time.

I've uninstalled AVG but didnt change anything.

I've posted log from Hijackthis below, what can be learnt from it I dont know!

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 19:30:34, on 13/10/2010
Platform: Windows Vista SP2 (WinNT 6.00.1906)
MSIE: Internet Explorer v8.00 (8.00.6001.18943)
Boot mode: Normal
Running processes:
C:\windows\system32\Dwm.exe
C:\windows\system32\taskeng.exe
C:\windows\Explorer.EXE
c:\Program Files\Hewlett-Packard\IAM\Bin\AsGHost.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\ActivIdentity\ActivClient\accrdsub.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWAMain.exe
C:\Program Files\Hewlett-Packard\File Sanitizer\CoreShredder.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\Hewlett-Packard\HP Quick Launch Buttons\QLBCTRL.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWTray.exe
C:\Program Files\Microsoft Office\Office12\GrooveMonitor.exe
C:\Program Files\AVG\AVG8\avgtray.exe
C:\Program Files\SGPSA\ie3sh.exe
C:\Program Files\HP\HP Software Update\hpwuschd2.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\HTC\HTC Sync 3.0\htcUPCTLoader.exe
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\Program Files\Creative\MediaSource\Detector\CTDetect.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BTTray.exe
c:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\Hewlett-Packard\HP wireless Assistant\WiFiMsg.EXE
C:\Program Files\Hewlett-Packard\Shared\HpqToaster.exe
C:\Program Files\Hewlett-Packard\HP Quick Launch Buttons\VolCtrl.exe
c:\Program Files\ActivIdentity\ActivClient\acevents.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CCC.exe
C:\Program Files\Synaptics\SynTP\SynTPHelper.exe
C:\Program Files\Carbonite\CarbonitePreinstaller.exe
C:\windows\system32\wuauclt.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\windows\system32\SearchFilterHost.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://ie.redirect.hp.com/svs/rdr?TYPE=3&tp=iehome&locale=en_ie&c=83&bd=all&pf=cmnb
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://ie.redirect.hp.com/svs/rdr?TYPE=3&tp=iehome&locale=en_ie&c=83&bd=all&pf=cmnb
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://ie.redirect.hp.com/svs/rdr?TYPE=3&tp=iehome&locale=en_ie&c=83&bd=all&pf=cmnb
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 = http://ie.redirect.hp.com/svs/rdr?TYPE=3&tp=iehome&locale=en_ie&c=83&bd=all&pf=cmnb
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: AVG Security Toolbar BHO - {A3BC75A2-1F87-4686-AA43-5347D756017C} - C:\Program Files\AVG\AVG8\Toolbar\IEToolbar.dll
R3 - URLSearchHook: (no name) - *{CFBFAE00-17A6-11D0-99CB-00C04FD64497} - (no file)
R3 - URLSearchHook: (no name) - *{91C18ED5-5E1C-4AE5-A148-A861DE8C8E16} - (no file)
F3 - REG:win.ini: load=C:\Users\BC\AppData\Local\Temp\fgkxan.exe
O2 - BHO: BHO_Startup - {3134413B-49B4-425C-98A5-893C1F195601} - C:\Program Files\Hewlett-Packard\File Sanitizer\IEBHO.dll
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG8\avgssie.dll
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\PROGRA~1\MICROS~2\Office12\GRA8E1~1.DLL
O2 - BHO: AOL Toolbar BHO - {7C554162-8CB7-45A4-B8F4-8EA1C75885F9} - C:\Program Files\AOL\AOL Toolbar 5.0\aoltb.dll
O2 - BHO: BrowserHelper Class - {8A9D74F9-560B-4FE7-ABEB-3B2E638E5CD6} - C:\Program Files\SGPSA\SearchAssistant.dll
O2 - BHO: AVG Security Toolbar BHO - {A3BC75A2-1F87-4686-AA43-5347D756017C} - C:\Program Files\AVG\AVG8\Toolbar\IEToolbar.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.1.1309.3572\swg.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: Credential Manager for HP ProtectTools - {DF21F1DB-80C6-11D3-9483-B03D0EC10000} - c:\Program Files\Hewlett-Packard\IAM\Bin\ItIEAddIn.dll
O2 - BHO: Search Assistant - {F0626A63-410B-45E2-99A1-3F2475B2D695} - C:\Program Files\SGPSA\BHO.dll
O3 - Toolbar: (no name) - {0BF43445-2F28-4351-9252-17FE6E806AA0} - (no file)
O3 - Toolbar: AOL Toolbar - {DE9C389F-3316-41A7-809B-AA305ED9D922} - C:\Program Files\AOL\AOL Toolbar 5.0\aoltb.dll
O3 - Toolbar: AVG Security Toolbar - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - C:\Program Files\AVG\AVG8\Toolbar\IEToolbar.dll
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [StartCCC] "c:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe"
O4 - HKLM\..\Run: [accrdsub] "c:\Program Files\ActivIdentity\ActivClient\accrdsub.exe"
O4 - HKLM\..\Run: [PTHOSTTR] c:\Program Files\Hewlett-Packard\HP ProtectTools Security Manager\PTHOSTTR.EXE /Start
O4 - HKLM\..\Run: [CognizanceTS] rundll32.exe c:\PROGRA~1\HEWLET~1\IAM\Bin\ASTSVCC.dll,RegisterModule
O4 - HKLM\..\Run: [PDF Complete] C:\Program Files\PDF Complete\pdfsty.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [hpWirelessAssistant] C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWAMain.exe
O4 - HKLM\..\Run: [HP Health Check Scheduler] c:\Program Files\Hewlett-Packard\HP Health Check\HPHC_Scheduler.exe
O4 - HKLM\..\Run: [File Sanitizer] C:\Program Files\Hewlett-Packard\File Sanitizer\CoreShredder.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [QlbCtrl.exe] C:\Program Files\Hewlett-Packard\HP Quick Launch Buttons\QlbCtrl.exe /Start
O4 - HKLM\..\Run: [WatchDog] C:\Program Files\InterVideo\DVD Check\DVDCheck.exe
O4 - HKLM\..\Run: [SoundMAX] C:\Program Files\Analog Devices\SoundMAX\soundmax.exe /tray
O4 - HKLM\..\Run: [Ad-Watch] C:\Program Files\Lavasoft\Ad-Aware\AAWTray.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [GrooveMonitor] "C:\Program Files\Microsoft Office\Office12\GrooveMonitor.exe"
O4 - HKLM\..\Run: [AVG8_TRAY] C:\PROGRA~1\AVG\AVG8\avgtray.exe
O4 - HKLM\..\Run: [FBSSA] C:\Program Files\SGPSA\ie3sh.exe
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\Hp\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [HTC Sync Loader] "C:\Program Files\HTC\HTC Sync 3.0\htcUPCTLoader.exe" -startup
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Program Files\Analog Devices\Core\smax4pnp.exe
O4 - HKLM\..\Run: [CarboniteSetupLite] "C:\Program Files\Carbonite\CarbonitePreinstaller.exe" /preinstalled /showonfirst /reshowat=900
O4 - HKLM\..\Run: [MaxMenuMgr] "C:\Program Files\Seagate\SeagateManager\FreeAgent Status\StxMenuMgr.exe"
O4 - HKCU\..\Run: [googletalk] C:\Users\BC\AppData\Roaming\Google\Google Talk\googletalk.exe /autostart
O4 - HKCU\..\Run: [Creative Detector] "C:\Program Files\Creative\MediaSource\Detector\CTDetect.exe" /R
O4 - HKCU\..\Run: [Google Update] "C:\Users\BC\AppData\Local\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [yihc.exe] C:\Users\BC\AppData\Local\Temp\yihc.exe
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-19\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'NETWORK SERVICE')
O4 - Global Startup: Bluetooth.lnk = ?
O4 - Global Startup: DVD Check.lnk = C:\Program Files\InterVideo\DVD Check\DVDCheck.exe
O8 - Extra context menu item: &AOL Toolbar Search - C:\ProgramData\AOL\ieToolbar\resources\en-IE\local\search.html
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Send image to &Bluetooth Device... - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htm
O8 - Extra context menu item: Send page to &Bluetooth Device... - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra button: Send to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: S&end to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: PokerStars - {3AD14F0C-ED16-4e43-B6D8-661B03F6A1EF} - C:\Program Files\PokerStars\PokerStarsUpdate.exe
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: @btrez.dll,-4015 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra 'Tools' menuitem: @btrez.dll,-12650 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O13 - Gopher Prefix:
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\PROGRA~1\MICROS~2\Office12\GR99D3~1.DLL
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Program Files\AVG\AVG8\avgpp.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O20 - AppInit_DLLs: APSHook.dll,avgrsstx.dll
O23 - Service: McAfee Application Installer Cleanup (0044861233284505) (0044861233284505mcinstcleanup) - Unknown owner - C:\windows\TEMP\004486~1.EXE (file missing)
O23 - Service: ActivClient Middleware Service (accoca) - ActivIdentity - c:\Program Files\ActivIdentity\ActivClient\accoca.exe
O23 - Service: Andrea ADI Filters Service (AEADIFilters) - Andrea Electronics Corporation - C:\windows\system32\AEADISRV.EXE
O23 - Service: Agere Modem Call Progress Audio (AgereModemAudio) - Agere Systems - C:\Windows\system32\agrsmsvc.exe
O23 - Service: Ati External Event Utility - ATI Technologies Inc. - C:\windows\system32\Ati2evxx.exe
O23 - Service: AVG8 WatchDog (avg8wd) - AVG Technologies CZ, s.r.o. - C:\PROGRA~1\AVG\AVG8\avgwdsvc.exe
O23 - Service: Com4QLBEx - Hewlett-Packard Development Company, L.P. - C:\Program Files\Hewlett-Packard\HP Quick Launch Buttons\Com4QLBEx.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\windows\system32\CTsvcCDA.exe
O23 - Service: Seagate Service (FreeAgentGoNext Service) - Seagate Technology LLC - C:\Program Files\Seagate\SeagateManager\Sync\FreeAgentService.exe
O23 - Service: Google Update Service (gupdate1c9916080f23e28) (gupdate1c9916080f23e28) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: HP Health Check Service - Hewlett-Packard - c:\Program Files\Hewlett-Packard\HP Health Check\hphc_service.exe
O23 - Service: HP ProtectTools Service - Hewlett-Packard Development Company, L.P - c:\Program Files\Hewlett-Packard\HP ProtectTools Security Manager\PTChangeFilterService.exe
O23 - Service: Drive Encryption Service (HpFkCryptService) - SafeBoot International - c:\Program Files\Hewlett-Packard\Drive Encryption\HpFkCrypt.exe
O23 - Service: File Sanitizer for HP ProtectTools (HPFSService) - Hewlett-Packard - C:\Program Files\Hewlett-Packard\File Sanitizer\HPFSService.exe
O23 - Service: hpqwmiex - Hewlett-Packard Development Company, L.P. - C:\Program Files\Hewlett-Packard\Shared\hpqWmiEx.exe
O23 - Service: HP Service (hpsrv) - Hewlett-Packard Company - C:\windows\system32\Hpservice.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: IviRegMgr - InterVideo - C:\Program Files\Common Files\InterVideo\RegMgr\iviRegMgr.exe
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Common Files\LightScribe\LSSrvc.exe
O23 - Service: PDF Document Manager (pdfcDispatcher) - PDF Complete Inc - C:\Program Files\PDF Complete\pdfsvc.exe
O23 - Service: Remote Procedure Call (RPC) Net (rpcnet) - Absolute Software Corp. - C:\windows\system32\rpcnet.exe
--
End of file - 13058 bytes

I included the AVG items to be removed since you said you had uninstalled it.
You can ignore them if you want.

Yeah start the pc in Normal safe mode.

Those 2 files are running from the Temp folder always a sign to be weary of it.

You can rename the file
C:\Users\BC\AppData\Local\Temp\yihc.exe_backup
or
C:\Users\BC\AppData\Local\Temp\yihc_backup.exe

Depends on whether or not you can see the .exe when renaming The first one would be better but it doesn't really matter (as long as you don't run it again) We will delete the files when we are running ok anyway.

The Folders may be hidden so you need to be able to View Hidden files:
http://www.microsoft.com/windowsxp/using/helpandsupport/learnmore/tips/hiddenfiles.mspx

Good Luck.

Connect the computer to the network.
Run the command prompt and run the command
"ipconfig /all > ipconfig_results.txt"
(without quotes and post the results here) the results will go into the file ipconfig_results.txt you will find it in the folder displayed on the command line

C:\users\USERNAME

Try connecting into the router with a cable to test if you can connect.