clients have not reported to WSUS console for X days!! PLEASE HELP

hi there.

i having issues our wsus, upon install , domain join computers had contacted console , updating normal. while ago stopped , if shed light on log information means grateful

server 2008 r2 - affecting clients

wsus on :80 - can access directory on web clients.

----log----

2012-11-21    11:40:05:057     936    d80    misc    ===========  logging initialized (build: 7.6.7600.256, tz: -0000)  ===========
2012-11-21    11:40:05:057     936    d80    misc      = process: c:\windows\system32\svchost.exe
2012-11-21    11:40:05:057     936    d80    misc      = module: c:\windows\system32\wuaueng.dll
2012-11-21    11:40:05:057     936    d80    service    *************
2012-11-21    11:40:05:057     936    d80    service    ** start **  service: service startup
2012-11-21    11:40:05:057     936    d80    service    *********
2012-11-21    11:40:05:057     936    d80    agent      * wu client version 7.6.7600.256
2012-11-21    11:40:05:057     936    d80    agent      * base directory: c:\windows\softwaredistribution
2012-11-21    11:40:05:057     936    d80    agent      * access type: no proxy
2012-11-21    11:40:05:057     936    d80    agent      * network state: connected
2012-11-21    11:40:05:821     936    d80    dtastor    default service au {00000000-0000-0000-0000-000000000000}
2012-11-21    11:40:05:837     936    d80    dtastor    default service au {9482f4b4-e343-43b6-b170-9a65bc822c77}
2012-11-21    11:40:05:884     936    d80    agent    warning: failed access auth cab, fatal error 0x80070003
2012-11-21    11:40:05:899     936    d80    agent    warning: invalid service in backup data store; cleaning
2012-11-21    11:40:05:899     936    d80    agent    warning: failed add , register service 7971f918-a847-4430-9279-4a52d1efe18d data store 0x80240031
2012-11-21    11:40:05:899     936    d80    agent    warning: default service recovery: attempting add pending registration service 7971f918-a847-4430-9279-4a52d1efe18d data store
2012-11-21    11:40:28:285     936    11c0    report    cwerreporter::init succeeded
2012-11-21    11:40:28:285     936    11c0    agent    ***********  agent: initializing windows update agent  ***********
2012-11-21    11:40:28:285     936    11c0    agent    ***********  agent: initializing global settings cache  ***********
2012-11-21    11:40:28:285     936    11c0    agent      * wsus server: <null>
2012-11-21    11:40:28:285     936    11c0    agent      * wsus status server: <null>
2012-11-21    11:40:28:285     936    11c0    agent      * target group: (unassigned computers)
2012-11-21    11:40:28:285     936    11c0    agent      * windows update access disabled: no
2012-11-21    11:40:28:285     936    11c0    dnldmgr    download manager restoring 0 downloads
2012-11-21    11:40:28:285     936    11c0    au    ###########  au: initializing automatic updates  ###########
2012-11-21    11:40:28:285     936    11c0    au      # approval type: scheduled (user preference)
2012-11-21    11:40:28:285     936    11c0    au      # scheduled install day/time: every day @ 3:00
2012-11-21    11:40:28:285     936    11c0    au      # auto-install minor updates: yes (user preference)
2012-11-21    11:40:28:285     936    11c0    au      # interact non-admins (non-admins elevated (user preference))
2012-11-21    11:40:28:285     936    11c0    au    setting au scheduled install time 2012-11-22 03:00:00
2012-11-21    11:40:28:488     936    d80    report    ***********  report: initializing static reporting data  ***********
2012-11-21    11:40:28:488     936    d80    report      * os version = 6.1.7601.1.0.65792
2012-11-21    11:40:28:488     936    d80    report      * os product type = 0x00000030
2012-11-21    11:40:28:504     936    d80    report      * computer brand = system manufacturer
2012-11-21    11:40:28:504     936    d80    report      * computer model = t-m2nc51pv
2012-11-21    11:40:28:504     936    d80    report      * bios revision = 0601   
2012-11-21    11:40:28:504     936    d80    report      * bios name = bios date: 07/23/08 10:07:34 ver: 08.00.12
2012-11-21    11:40:28:504     936    d80    report      * bios release date = 2008-07-23t00:00:00
2012-11-21    11:40:28:504     936    d80    report      * locale id = 2057
2012-11-21    11:40:28:504     936    11c0    au    successfully wrote event au health state:0
2012-11-21    11:40:28:504     936    11c0    au    initializing featured updates
2012-11-21    11:40:28:504     936    11c0    au    found 0 cached featured updates
2012-11-21    11:40:28:504     936    11c0    au    successfully wrote event au health state:0
2012-11-21    11:40:28:504     936    11c0    au    successfully wrote event au health state:0
2012-11-21    11:40:28:504     936    11c0    au    au finished delayed initialization
2012-11-21    11:40:28:504     936    11c0    au    triggering au detection through detectnow api
2012-11-21    11:40:28:504     936    11c0    au    triggering online detection (non-interactive)
2012-11-21    11:40:28:504     936    d80    au    #############
2012-11-21    11:40:28:504     936    d80    au    ## start ##  au: search updates
2012-11-21    11:40:28:504     936    d80    au    #########
2012-11-21    11:40:28:519     936    d80    au    <<## submitted ## au: search updates [callid = {1189504b-be43-42bc-b0e4-b941666b6312}]
2012-11-21    11:40:28:519     936    494    agent    *************
2012-11-21    11:40:28:519     936    494    agent    ** start **  agent: finding updates [callerid = automaticupdates]
2012-11-21    11:40:28:519     936    494    agent    *********
2012-11-21    11:40:28:519     936    494    agent      * online = yes; ignore download priority = no
2012-11-21    11:40:28:519     936    494    agent      * criteria = "isinstalled=0 , deploymentaction='installation' or ispresent=1 , deploymentaction='uninstallation' or isinstalled=1 , deploymentaction='installation' , rebootrequired=1 or isinstalled=0 , deploymentaction='uninstallation' , rebootrequired=1"
2012-11-21    11:40:28:519     936    494    agent      * serviceid = {9482f4b4-e343-43b6-b170-9a65bc822c77} windows update
2012-11-21    11:40:28:519     936    494    agent      * search scope = {machine}
2012-11-21    11:40:31:280     936    494    misc    warning: winhttp: sendrequesttoserverforfileinformation failed 0x80190194
2012-11-21    11:40:31:280     936    494    misc    warning: winhttp: shouldfilebedownloaded failed 0x80190194
2012-11-21    11:40:31:280     936    494    misc    warning: downloadfileinternal failed http://download.windowsupdate.com/v9/1/windowsupdate/redir/muv4wuredir.cab: error 0x80190194
2012-11-21    11:40:33:714     936    494    misc    warning: winhttp: sendrequesttoserverforfileinformation failed 0x80190194
2012-11-21    11:40:33:714     936    494    misc    warning: winhttp: shouldfilebedownloaded failed 0x80190194
2012-11-21    11:40:33:714     936    494    misc    warning: downloadfileinternal failed http://download.microsoft.com/v9/1/windowsupdate/redir/muv4wuredir.cab: error 0x80190194
2012-11-21    11:40:36:881     936    494    misc    validating signature c:\windows\softwaredistribution\wuredir\9482f4b4-e343-43b6-b170-9a65bc822c77\muv4wuredir.cab:
2012-11-21    11:40:36:896     936    494    misc     microsoft signed: yes
2012-11-21    11:40:36:896     936    494    agent    downloading new auth cab service 7971f918-a847-4430-9279-4a52d1efe18d @ http://ds.download.windowsupdate.com/v10/1/microsoftupdate/redir/muauth.cab
2012-11-21    11:40:39:455     936    494    misc    validating signature c:\windows\softwaredistribution\authcabs\authcab.cab:
2012-11-21    11:40:39:470     936    494    misc     microsoft signed: yes
2012-11-21    11:40:39:470     936    494    misc    validating signature c:\windows\softwaredistribution\authcabs\authcab.cab:
2012-11-21    11:40:39:470     936    494    misc     microsoft signed: yes
2012-11-21    11:40:39:502     936    494    dtastor    default service au {9482f4b4-e343-43b6-b170-9a65bc822c77}
2012-11-21    11:40:39:517     936    494    agent    caller default service recovery opted in service 7971f918-a847-4430-9279-4a52d1efe18d
2012-11-21    11:40:39:517     936    494    dtastor    update service properties: service registered au {7971f918-a847-4430-9279-4a52d1efe18d}
2012-11-21    11:40:39:517     936    d80    au    service provider info changed
2012-11-21    11:40:39:517     936    d80    au    au refresh required....
2012-11-21    11:40:39:517     936    494    agent      * warning: online service registration/service id resolution failed, hr=0x8024a005
2012-11-21    11:40:39:517     936    494    agent      * warning: exit code = 0x8024a005
2012-11-21    11:40:39:517     936    494    agent    *********
2012-11-21    11:40:39:517     936    494    agent    **  end  **  agent: finding updates [callerid = automaticupdates]
2012-11-21    11:40:39:517     936    494    agent    *************
2012-11-21    11:40:39:517     936    494    agent    warning: wu client failed searching update error 0x8024a005
2012-11-21    11:40:39:517     936    d80    au    au setting next detection timeout 2012-11-21 11:50:39
2012-11-21    11:40:39:517     936    d80    au    au setting next featured software notification timeout 2012-11-21 11:40:39
2012-11-21    11:40:39:517     936    d80    au    successfully wrote event au health state:0
2012-11-21    11:40:39:517     936    66c    agent    warning: wu client fails call search call {1189504b-be43-42bc-b0e4-b941666b6312} error 0x8024000c
2012-11-21    11:40:39:548     936    494    report    cwerreporter finishing event handling. (00000000)
2012-11-21    11:40:44:525     936    494    report    report event: {372b4732-b49e-443a-a7d3-4fae522b8f91}    2012-11-21 11:40:39:517-0000    1    148    101    {00000000-0000-0000-0000-000000000000}    0    8024a005    automaticupdates    failure    software synchronization    windows update client failed detect error 0x8024a005.
2012-11-21    11:40:44:571     936    494    report    cwerreporter::handleevents - wer report upload completed status 0x8
2012-11-21    11:40:44:571     936    494    report    wer report sent: 7.6.7600.256 0x8024a005 00000000-0000-0000-0000-000000000000 scan 101 unmanaged
2012-11-21    11:40:44:571     936    494    report    cwerreporter finishing event handling. (00000000)

you client's download updates microsoft update, , not wsus:

>>downloadfileinternal failed http://download.windowsupdate.com/v9/1/windowsupdate/redir/muv4wuredir.cab: error 0x80190194<<

so, @ first  check servers applied policy assign them wsus

Windows Server  >  WSUS