Websitenaufruf nach unterschiedlicher Zeit nicht mehr möglich

#1 Hallo zusammen,
seit ein paar Tagen habe ich das Problem, dass nach einer gewisser Zeit keinerlei neue Websites mehr aufgerufen werden können. Ich nutzt Windows 7 Pro und das Problem erstreckt sich auf allen Browsern.
Chrome Version ist 25.0.1364.152 m. Win 7 Pro SP 1.
Verbindungen zu ftp-Servern oder Skypeverbindungen funktionieren in der Zeit weiter. Genauso wie lokale Netzwerkzugriffe. AVG spuckt keine Viruswarnung aus, CCleaner und Spybot S&D auch keine Maleware und keine Probleme.

HijackThis Log:

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 17:04:51, on 13.03.2013
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v9.00 (9.00.8112.16464)
Boot mode: Normal

Running processes:
C:\Program Files (x86)\DAEMON Tools Lite\DTLite.exe
C:\Users\Benedikt\AppData\Roaming\Spotify\Data\SpotifyWebHelper.exe
C:\Users\Benedikt\AppData\Roaming\Dropbox\bin\Dropbox.exe
C:\Program Files (x86)\AVG\AVG2013\avgui.exe
C:\Program Files (x86)\Cisco\Cisco AnyConnect Secure Mobility Client\vpnui.exe
C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe
C:\Program Files (x86)\HTC\HTC Sync Manager\HTC Sync\adb.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Benedikt\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Mozilla Thunderbird\thunderbird.exe
C:\Users\Benedikt\Downloads\alarm\HiJackThis204.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
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://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\Windows\SysWOW64\blank.htm
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
F2 - REG:system.ini: UserInit=userinit.exe
O2 - BHO: (no name) - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files (x86)\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Increase performance and video formats for your HTML5 <video> - {326E768D-4182-46FD-9C16-1449A49795F4} - C:\Program Files (x86)\DivX\DivX Plus Web Player\npdivx32.dll
O2 - BHO: Use the DivX Plus Web Player to watch web videos with less interruptions and smoother playback on supported sites - {593DDEC6-7468-4cdd-90E1-42DADAA222E9} - C:\Program Files (x86)\DivX\DivX Plus Web Player\npdivx32.dll
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\PROGRA~2\MICROS~3\Office14\GROOVEEX.DLL
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files (x86)\Java\jre7\bin\ssv.dll
O2 - BHO: Windows Live ID-Anmelde-Hilfsprogramm - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Program Files (x86)\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O2 - BHO: URLRedirectionBHO - {B4F3A835-0E21-4959-BA22-42B3008E02FF} - C:\PROGRA~2\MICROS~3\Office14\URLREDIR.DLL
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files (x86)\Java\jre7\bin\jp2ssv.dll
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files (x86)\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [AVG_UI] "C:\Program Files (x86)\AVG\AVG2013\avgui.exe" /TRAYONLY
O4 - HKLM\..\Run: [Cisco AnyConnect Secure Mobility Agent for Windows] "C:\Program Files (x86)\Cisco\Cisco AnyConnect Secure Mobility Client\vpnui.exe" -minimized
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [APSDaemon] "C:\Program Files (x86)\Common Files\Apple\Apple Application Support\APSDaemon.exe"
O4 - HKCU\..\Run: [DAEMON Tools Lite] "C:\Program Files (x86)\DAEMON Tools Lite\DTLite.exe" -autorun
O4 - HKCU\..\Run: [Google Update] "C:\Users\Benedikt\AppData\Local\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [Spotify Web Helper] "C:\Users\Benedikt\AppData\Roaming\Spotify\Data\SpotifyWebHelper.exe"
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /autoRun (User 'LOKALER DIENST')
O4 - HKUS\S-1-5-19\..\RunOnce: [mctadmin] C:\Windows\System32\mctadmin.exe (User 'LOKALER DIENST')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /autoRun (User 'NETZWERKDIENST')
O4 - HKUS\S-1-5-20\..\RunOnce: [mctadmin] C:\Windows\System32\mctadmin.exe (User 'NETZWERKDIENST')
O4 - Startup: Dropbox.lnk = C:\Users\Benedikt\AppData\Roaming\Dropbox\bin\Dropbox.exe
O8 - Extra context menu item: An OneNote s&enden - res://C:\PROGRA~1\MICROS~1\Office14\ONBttnIE.dll/105
O8 - Extra context menu item: Nach Microsoft E&xcel exportieren - res://C:\PROGRA~1\MICROS~1\Office14\EXCEL.EXE/3000
O9 - Extra button: An OneNote senden - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\Program Files (x86)\Microsoft Office\Office14\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: An OneNote s&enden - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\Program Files (x86)\Microsoft Office\Office14\ONBttnIE.dll
O9 - Extra button: ICQ7.2 - {72EFBFE4-C74F-4187-AEFD-73EA3BE968D6} - C:\Program Files (x86)\ICQ7.2\ICQ.exe
O9 - Extra 'Tools' menuitem: ICQ7.2 - {72EFBFE4-C74F-4187-AEFD-73EA3BE968D6} - C:\Program Files (x86)\ICQ7.2\ICQ.exe
O9 - Extra button: Verknüpfte &OneNote-Notizen - {789FE86F-6FC4-46A1-9849-EDE0DB0C95CA} - C:\Program Files (x86)\Microsoft Office\Office14\ONBttnIELinkedNotes.dll
O9 - Extra 'Tools' menuitem: Verknüpfte &OneNote-Notizen - {789FE86F-6FC4-46A1-9849-EDE0DB0C95CA} - C:\Program Files (x86)\Microsoft Office\Office14\ONBttnIELinkedNotes.dll
O9 - Extra button: Skype Click to Call - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files (x86)\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O10 - Unknown file in Winsock LSP: c:\program files (x86)\common files\microsoft shared\windows live\wlidnsp.dll
O10 - Unknown file in Winsock LSP: c:\program files (x86)\common files\microsoft shared\windows live\wlidnsp.dll
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O16 - DPF: {538793D5-659C-4639-A56C-A179AD87ED44} (Cisco AnyConnect Secure Mobility Client Web Control) - https://vpn.rwth-aachen.de/CACHE/stc/1/binaries/vpnweb.cab
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - (no file)
O18 - Protocol: skype-ie-addon-data - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Program Files (x86)\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~2\COMMON~1\Skype\SKYPE4~1.DLL
O18 - Filter hijack: text/xml - {807573E5-5146-11D5-A672-00B0D022E945} - C:\Program Files (x86)\Common Files\Microsoft Shared\OFFICE14\MSOXMLMF.DLL
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing)
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files (x86)\Common Files\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: AVGIDSAgent - AVG Technologies CZ, s.r.o. - C:\Program Files (x86)\AVG\AVG2013\avgidsagent.exe
O23 - Service: AVG WatchDog (avgwd) - AVG Technologies CZ, s.r.o. - C:\Program Files (x86)\AVG\AVG2013\avgwdsvc.exe
O23 - Service: Dienst "Bonjour" (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: BrSplService (Brother XP spl Service) - brother Industries Ltd - C:\Windows\SysWOW64\brsvc01a.exe
O23 - Service: ShrewSoft DNS Proxy Daemon (dtpd) - Unknown owner - C:\Program Files\ShrewSoft\VPN Client\dtpd.exe
O23 - Service: @%SystemRoot%\system32\efssvc.dll,-100 (EFS) - Unknown owner - C:\Windows\System32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\fxsresm.dll,-118 (Fax) - Unknown owner - C:\Windows\system32\fxssvc.exe (file missing)
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - C:\Program Files (x86)\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: HTCMonitorService - Nero AG - C:\Program Files (x86)\HTC\HTC Sync Manager\HSMServiceEntry.exe
O23 - Service: ShrewSoft IKE Daemon (iked) - Unknown owner - C:\Program Files\ShrewSoft\VPN Client\iked.exe
O23 - Service: iPod-Dienst (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: ShrewSoft IPSEC Daemon (ipsecd) - Unknown owner - C:\Program Files\ShrewSoft\VPN Client\ipsecd.exe
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: KMService - Unknown owner - C:\Windows\system32\srvany.exe
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\Windows\System32\msdtc.exe (file missing)
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (nvsvc) - Unknown owner - C:\Windows\system32\nvvsvc.exe (file missing)
O23 - Service: Internet Pass-Through Service (PassThru Service) - Unknown owner - C:\Program Files (x86)\HTC\Internet Pass-Through\PassThruSvr.exe
O23 - Service: PnkBstrA - Unknown owner - C:\Windows\system32\PnkBstrA.exe
O23 - Service: @%systemroot%\system32\psbase.dll,-300 (ProtectedStorage) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - CACE Technologies, Inc. - C:\Program Files (x86)\WinPcap\rpcapd.exe
O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\Windows\system32\locator.exe (file missing)
O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: Skype C2C Service - Skype Technologies S.A. - C:\ProgramData\Skype\Toolbars\Skype C2C Service\c2c_service.exe
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files (x86)\Skype\Updater\Updater.exe
O23 - Service: @%SystemRoot%\system32\snmptrap.exe,-3 (SNMPTRAP) - Unknown owner - C:\Windows\System32\snmptrap.exe (file missing)
O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\Windows\System32\spoolsv.exe (file missing)
O23 - Service: @%SystemRoot%\system32\sppsvc.exe,-101 (sppsvc) - Unknown owner - C:\Windows\system32\sppsvc.exe (file missing)
O23 - Service: Steam Client Service - Valve Corporation - C:\Program Files (x86)\Common Files\Steam\SteamService.exe
O23 - Service: NVIDIA Stereoscopic 3D Driver Service (Stereo Service) - NVIDIA Corporation - C:\Program Files (x86)\NVIDIA Corporation\3D Vision\nvSCPAPISvr.exe
O23 - Service: SwitchBoard - Adobe Systems Incorporated - C:\Program Files (x86)\Common Files\Adobe\SwitchBoard\SwitchBoard.exe
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\Windows\system32\UI0Detect.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vaultsvc.dll,-1003 (VaultSvc) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\Windows\System32\vds.exe (file missing)
O23 - Service: VirtualRouterService (Virtual Router) - Chris Pietschmann (http://pietschsoft.com) - C:\Program Files (x86)\Virtual Router\VirtualRouterService.exe
O23 - Service: Cisco AnyConnect Secure Mobility Agent (vpnagent) - Cisco Systems, Inc. - C:\Program Files (x86)\Cisco\Cisco AnyConnect Secure Mobility Client\vpnagent.exe
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\Windows\system32\vssvc.exe (file missing)
O23 - Service: @%SystemRoot%\system32\Wat\WatUX.exe,-601 (WatAdminSvc) - Unknown owner - C:\Windows\system32\Wat\WatAdminSvc.exe (file missing)
O23 - Service: @%systemroot%\system32\wbengine.exe,-104 (wbengine) - Unknown owner - C:\Windows\system32\wbengine.exe (file missing)
O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\Windows\system32\wbem\WmiApSrv.exe (file missing)
O23 - Service: @%PROGRAMFILES%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - C:\Program Files (x86)\Windows Media Player\wmpnetwk.exe (file missing)

--
End of file - 13973 bytes

#2 Hast Du getestet, ob https-Seiten gehen? Da alle Browser betroffen sind, klingt es fast so, als ob Port 80 den Geist aufgibt, wobei Skype eigentlich auch über Port 80 kommuniziert und dann nicht mehr funktionieren sollte...

Welche Browser hast Du getestet? Bedenke, dass Chrome und Internet Explorer dieselben Interneteinstellungen nutzen. Firefox und Opera haben eigene Einstellungen, weshalb Du unbedingt auch einen von diesen Browsern testen solltest.
Funktionieren Steam und Spotify, wenn das Problem auftritt?

Nutzt Du irgendeinen Netzwerkdienst, während das Problem auftritt? Also ein VPN (Shrew oder Cisco) oder einen Proxy-Server? Hast Du im Virenscanner den Webschutz* aktiviert?
(* keine Ahnung, wie das bei AVG heißt, aber in der Regel haben Virenscanner ein Modul, mit dem sie den Traffic über Port 80 und 443 abgreifen und auf Viren prüfen, bevor der Traffic dann an den Browser weitergeleitet wird. Das kann zu Problemen führen.)

Wie ich sehe, hast Du rpcapd installiert (WinPcap/Wireshark?). Das kann durchaus zu diesen Problemen führen. Als weitere potentielle Fehlerquelle würde ich den Virtual Router einschätzen (vielleicht kommt WinPcap auch von dem?).
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