I am using WSUS 3.0 SP2 on my domain and a week ago I changed the time on my GPO to update the clients. After that the clients stopped updating and rebooting like they were doing before. I haven't modified anything else in my GPO other than the time the clients are to install the updates and they worked fine before. The log from one of the clients is below. The icon in the system tray shows up that updates are available and I can see in the event logs that the client downloaded the updates. On this client I tried de-registering the dll's and re-registering them. I checked all my settings in GPO and toggled them but no luck.
2013-01-2913:26:32:6617843a8AUTriggering AU detection through DetectNow API2013-01-2913:26:32:6617843a8AUTriggering Online detection (non-interactive)
2013-01-2913:26:32:66178430cAU#############
2013-01-2913:26:32:66178430cAU## START ## AU: Search for updates
2013-01-2913:26:32:66178430cAU#########
2013-01-2913:26:32:66178430cAU<<## SUBMITTED ## AU: Search for updates [CallId = {411E6EDB-EA3E-49DA-A88F-F35E7618184A}]
2013-01-2913:26:32:661784a4cAgent*************
2013-01-2913:26:32:661784a4cAgent** START ** Agent: Finding updates [CallerId = AutomaticUpdates]
2013-01-2913:26:32:661784a4cAgent*********
2013-01-2913:26:32:661784a4cAgent * Online = Yes; Ignore download priority = No
2013-01-2913:26:32:661784a4cAgent * Criteria = "IsHidden=0 and IsInstalled=0 and DeploymentAction='Installation' and IsAssigned=1 or IsHidden=0 and IsPresent=1 and DeploymentAction='Uninstallation' and IsAssigned=1 or IsHidden=0 and IsInstalled=1 and DeploymentAction='Installation' and IsAssigned=1 and RebootRequired=1 or IsHidden=0 and IsInstalled=0 and DeploymentAction='Uninstallation' and IsAssigned=1 and RebootRequired=1"
2013-01-2913:26:32:661784a4cAgent * ServiceID = {3DA21691-E39D-4DA6-8A4B-B43877BCB1B7} Managed
2013-01-2913:26:32:661784a4cAgent * Search Scope = {Machine}
2013-01-2913:26:34:414784a4cMiscValidating signature for C:\WINDOWS\SoftwareDistribution\SelfUpdate\Default\wuident.cab:
2013-01-2913:26:34:424784a4cMiscMicrosoft signed: Yes
2013-01-2913:26:36:938784a4cMiscValidating signature for C:\WINDOWS\SoftwareDistribution\SelfUpdate\Default\wuident.cab:
2013-01-2913:26:36:948784a4cMiscMicrosoft signed: Yes
2013-01-2913:26:36:958784a4cMiscValidating signature for C:\WINDOWS\SoftwareDistribution\SelfUpdate\Default\wsus3setup.cab:
2013-01-2913:26:36:958784a4cMiscMicrosoft signed: Yes
2013-01-2913:26:36:968784a4cSetup*********** Setup: Checking whether self-update is required ***********
2013-01-2913:26:36:968784a4cSetup * Inf file: C:\WINDOWS\SoftwareDistribution\SelfUpdate\Default\wsus3setup.inf
2013-01-2913:26:36:968784a4cSetupUpdate NOT required for C:\WINDOWS\system32\cdm.dll: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:968784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wuapi.dll: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:968784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wuapi.dll.mui: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:968784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wuauclt.exe: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:968784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wuaucpl.cpl: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:968784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wuaucpl.cpl.mui: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:978784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wuaueng.dll: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:978784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wuaueng.dll.mui: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:978784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wucltui.dll: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:978784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wucltui.dll.mui: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:978784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wups.dll: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:978784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wups2.dll: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:978784a4cSetupUpdate NOT required for C:\WINDOWS\system32\wuweb.dll: target version = 7.4.7600.226, required version = 7.4.7600.226
2013-01-2913:26:36:978784a4cSetup * IsUpdateRequired = No
2013-01-2913:26:39:171784a4cPT+++++++++++ PT: Synchronizing server updates +++++++++++
2013-01-2913:26:39:171784a4cPT + ServiceId = {3DA21691-E39D-4DA6-8A4B-B43877BCB1B7}, Server URL = http://lab-wsus.pdxlab.net/ClientWebService/client.asmx
2013-01-2913:26:39:301784a4cPTWARNING: Cached cookie has expired or new PID is available
2013-01-2913:26:39:301784a4cPTInitializing simple targeting cookie, clientId = cc21168f-b3e7-4739-b24c-dc22b3d5b99a, target group = , DNS name = lab-appscan02.pdxlab.net
2013-01-2913:26:39:301784a4cPT Server URL = http://servername/SimpleAuthWebService/SimpleAuth.asmx
2013-01-2913:26:40:483784a4cPT+++++++++++ PT: Synchronizing extended update info +++++++++++
2013-01-2913:26:40:483784a4cPT + ServiceId = {3DA21691-E39D-4DA6-8A4B-B43877BCB1B7}, Server URL = http://lab-wsus.pdxlab.net/ClientWebService/client.asmx
2013-01-2913:26:42:897784a4cAgent * Added update {4F26C3BA-B457-410C-B0C7-4481BED14E45}.200 to search result
2013-01-2913:26:42:897784a4cAgent * Added update {A5F1C0E5-16A2-4503-9F7A-F54D1AAD38F0}.201 to search result
2013-01-2913:26:42:897784a4cAgent * Added update {8BCDF9DC-3C05-4C6D-A9D9-524233E2F7B5}.201 to search result
2013-01-2913:26:42:897784a4cAgent * Added update {8B17286C-09B3-42CE-9AED-13222FEE8F25}.203 to search result
2013-01-2913:26:42:897784a4cAgent * Added update {5938913D-4468-4E05-A320-EC6EA07AA389}.201 to search result
2013-01-2913:26:42:897784a4cAgent * Added update {FDBEF574-459E-4C57-A840-4E66EE7EC9F2}.202 to search result
2013-01-2913:26:42:897784a4cAgent * Added update {5D543FC2-04E5-4A4E-AF2B-7F05C1F055F2}.200 to search result
2013-01-2913:26:42:897784a4cAgent * Found 7 updates and 66 categories in search; evaluated appl. rules of 775 out of 1589 deployed entities
2013-01-2913:26:42:957784a4cAgent*********
2013-01-2913:26:42:957784a4cAgent** END ** Agent: Finding updates [CallerId = AutomaticUpdates]
2013-01-2913:26:42:957784a4cAgent*************
2013-01-2913:26:42:967784458AU>>## RESUMED ## AU: Search for updates [CallId = {411E6EDB-EA3E-49DA-A88F-F35E7618184A}]
2013-01-2913:26:42:967784458AU # 7 updates detected
2013-01-2913:26:42:967784458AU#########
2013-01-2913:26:42:967784458AU## END ## AU: Search for updates [CallId = {411E6EDB-EA3E-49DA-A88F-F35E7618184A}]
2013-01-2913:26:42:967784458AU#############
2013-01-2913:26:42:967784458AUFeatured notifications is disabled.
2013-01-2913:26:42:967784458AUAU setting next detection timeout to 2013-01-30 05:02:46
2013-01-2913:26:47:964784a4cReportREPORT EVENT: {B39BFC90-3BDD-4603-9C22-7A88FF698A52}2013-01-29 13:26:42:957-08001147101{00000000-0000-0000-0000-000000000000} 00AutomaticUpdatesSuccessSoftware SynchronizationWindows Update Client successfully detected 7 updates.
2013-01-2913:26:47:964784a4cReportREPORT EVENT: {F9E1179B-8A0A-41CA-94CC-EF2B21C1BA6D}2013-01-29 13:26:42:957-08001156101{00000000-0000-0000-0000-000000000000} 00AutomaticUpdatesSuccessPre-Deployment CheckReporting client status.
2013-01-2913:29:12:040784a4cReportUploading 2 events using cached cookie, reporting URL = http://lab-servername/ReportingWebService/ReportingWebService.asmx
2013-01-2913:29:12:050784a4cReportReporter successfully uploaded 2 events.