Clients cannot update from WSUS server - error 8024400E

Alright, so I'm troubleshooting our WSUS server and seem to be stuck. I am running WSUS 3.2.7600.226 on Server 2003.  The client I have been using for testing is Windows 7 x64, but we have this issue on all clients (XP, 7 x86, and 7 x64).  I started with an error of 800B0001 and after googling installed KB2720211 to fix it. Now I am getting error 8024400E on clients when I attempt to update. I followed a technet walkthrough and verified that my WSUS settings are all correct (at least regarding iis, registry, gpo settings, and file system permissions). I am able to download CAB files from the WSUS server by going to the proper address in a browser. Here is a snippet from my WindowsUpdate log on my client:

2013-12-20 10:27:29:784 972 23ac AU #############
2013-12-20 10:27:29:784 972 23ac AU ## START ## AU: Search for updates
2013-12-20 10:27:29:784 972 23ac AU #########
2013-12-20 10:27:29:785 972 23ac AU <<## SUBMITTED ## AU: Search for updates [CallId = {749E5CD5-F4DE-48FC-A691-3610EF622CE3}]
2013-12-20 10:27:29:785 972 2bcc Agent *************
2013-12-20 10:27:29:785 972 2bcc Agent ** START ** Agent: Finding updates [CallerId = AutomaticUpdates]
2013-12-20 10:27:29:785 972 2bcc Agent *********
2013-12-20 10:27:29:785 972 2bcc Agent * Online = Yes; Ignore download priority = No
2013-12-20 10:27:29:785 972 2bcc Agent * Criteria = "IsInstalled=0 and DeploymentAction='Installation' or IsPresent=1 and DeploymentAction='Uninstallation' or IsInstalled=1 and DeploymentAction='Installation' and RebootRequired=1 or IsInstalled=0 and DeploymentAction='Uninstallation' and RebootRequired=1"
2013-12-20 10:27:29:785 972 2bcc Agent * ServiceID = {3DA21691-E39D-4DA6-8A4B-B43877BCB1B7} Managed
2013-12-20 10:27:29:785 972 2bcc Agent * Search Scope = {Machine}
2013-12-20 10:27:29:785 972 2bcc Setup Checking for agent SelfUpdate
2013-12-20 10:27:29:785 972 2bcc Setup Client version: Core: 7.6.7600.256 Aux: 7.6.7600.256
2013-12-20 10:27:29:785 972 2bcc Misc Validating signature for C:\Windows\SoftwareDistribution\SelfUpdate\wuident.cab:
2013-12-20 10:27:29:789 972 2bcc Misc Microsoft signed: Yes
2013-12-20 10:27:29:794 972 2bcc Misc Validating signature for C:\Windows\SoftwareDistribution\SelfUpdate\wuident.cab:
2013-12-20 10:27:29:797 972 2bcc Misc Microsoft signed: Yes
2013-12-20 10:27:29:799 972 2bcc Misc Validating signature for C:\Windows\SoftwareDistribution\SelfUpdate\wsus3setup.cab:
2013-12-20 10:27:29:803 972 2bcc Misc Microsoft signed: Yes
2013-12-20 10:27:29:808 972 2bcc Misc Validating signature for C:\Windows\SoftwareDistribution\SelfUpdate\wsus3setup.cab:
2013-12-20 10:27:29:812 972 2bcc Misc Microsoft signed: Yes
2013-12-20 10:27:29:821 972 2bcc Setup Determining whether a new setup handler needs to be downloaded
2013-12-20 10:27:29:821 972 2bcc Setup SelfUpdate handler is not found. It will be downloaded
2013-12-20 10:27:29:821 972 2bcc Setup Evaluating applicability of setup package "WUClient-SelfUpdate-ActiveX~31bf3856ad364e35~amd64~~7.6.7600.256"
2013-12-20 10:27:29:823 972 2bcc Setup Setup package "WUClient-SelfUpdate-ActiveX~31bf3856ad364e35~amd64~~7.6.7600.256" is already installed.
2013-12-20 10:27:29:823 972 2bcc Setup Evaluating applicability of setup package "WUClient-SelfUpdate-Aux-TopLevel~31bf3856ad364e35~amd64~~7.6.7600.256"
2013-12-20 10:27:29:835 972 2bcc Setup Setup package "WUClient-SelfUpdate-Aux-TopLevel~31bf3856ad364e35~amd64~~7.6.7600.256" is already installed.
2013-12-20 10:27:29:835 972 2bcc Setup Evaluating applicability of setup package "WUClient-SelfUpdate-Core-TopLevel~31bf3856ad364e35~amd64~~7.6.7600.256"
2013-12-20 10:27:29:852 972 2bcc Setup Setup package "WUClient-SelfUpdate-Core-TopLevel~31bf3856ad364e35~amd64~~7.6.7600.256" is already installed.
2013-12-20 10:27:29:852 972 2bcc Setup SelfUpdate check completed. SelfUpdate is NOT required.
2013-12-20 10:27:29:884 972 2bcc PT +++++++++++ PT: Synchronizing server updates +++++++++++
2013-12-20 10:27:29:884 972 2bcc PT + ServiceId = {3DA21691-E39D-4DA6-8A4B-B43877BCB1B7}, Server URL = http://wsusservername/ClientWebService/client.asmx
2013-12-20 10:27:29:896 972 2bcc PT WARNING: Cached cookie has expired or new PID is available
2013-12-20 10:27:29:896 972 2bcc PT Initializing simple targeting cookie, clientId = 488f3922-1a4e-4921-b015-25957eeb6500, target group = http://wsusservername, DNS name = mycomputer.domain.local
2013-12-20 10:27:29:896 972 2bcc PT Server URL = http://wsusservername/SimpleAuthWebService/SimpleAuth.asmx
2013-12-20 10:27:29:902 972 2bcc PT WARNING: GetAuthorizationCookie failure, error = 0x8024400E, soap client error = 7, soap error code = 400, HTTP status code = 200
2013-12-20 10:27:29:902 972 2bcc PT WARNING: SOAP Fault: 0x000190
2013-12-20 10:27:29:902 972 2bcc PT WARNING: faultstring:Fault occurred
2013-12-20 10:27:29:902 972 2bcc PT WARNING: ErrorCode:InternalServerError(5)
2013-12-20 10:27:29:902 972 2bcc PT WARNING: Message:(null)
2013-12-20 10:27:29:902 972 2bcc PT WARNING: Method:"http://www.microsoft.com/SoftwareDistribution/Server/SimpleAuthWebService/GetAuthorizationCookie";
2013-12-20 10:27:29:902 972 2bcc PT WARNING: ID:9d989bf6-04e3-44a9-8ffd-f20bb997b3f0
2013-12-20 10:27:29:902 972 2bcc PT WARNING: Failed to initialize Simple Targeting Cookie: 0x8024400e
2013-12-20 10:27:29:902 972 2bcc PT WARNING: PopulateAuthCookies failed: 0x8024400e
2013-12-20 10:27:29:902 972 2bcc PT WARNING: RefreshCookie failed: 0x8024400e
2013-12-20 10:27:29:902 972 2bcc PT WARNING: RefreshPTState failed: 0x8024400e
2013-12-20 10:27:29:902 972 2bcc PT WARNING: Sync of Updates: 0x8024400e
2013-12-20 10:27:29:902 972 2bcc PT WARNING: SyncServerUpdatesInternal failed: 0x8024400e
2013-12-20 10:27:29:902 972 2bcc Agent * WARNING: Failed to synchronize, error = 0x8024400E
2013-12-20 10:27:29:902 972 2bcc Agent * WARNING: Exit code = 0x8024400E
2013-12-20 10:27:29:902 972 2bcc Agent *********
2013-12-20 10:27:29:902 972 2bcc Agent ** END ** Agent: Finding updates [CallerId = AutomaticUpdates]
2013-12-20 10:27:29:902 972 2bcc Agent *************
2013-12-20 10:27:29:902 972 2bcc Agent WARNING: WU client failed Searching for update with error 0x8024400e
2013-12-20 10:27:29:902 972 1bc8 AU >>## RESUMED ## AU: Search for updates [CallId = {749E5CD5-F4DE-48FC-A691-3610EF622CE3}]
2013-12-20 10:27:29:902 972 1bc8 AU # WARNING: Search callback failed, result = 0x8024400E
2013-12-20 10:27:29:902 972 1bc8 AU # WARNING: Failed to find updates with error code 8024400E
2013-12-20 10:27:29:902 972 1bc8 AU #########
2013-12-20 10:27:29:902 972 1bc8 AU ## END ## AU: Search for updates [CallId = {749E5CD5-F4DE-48FC-A691-3610EF622CE3}]
2013-12-20 10:27:29:902 972 1bc8 AU #############
2013-12-20 10:27:29:903 972 1bc8 AU Successfully wrote event for AU health state:0
2013-12-20 10:27:29:903 972 1bc8 AU AU setting next detection timeout to 2013-12-20 21:27:29
2013-12-20 10:27:29:903 972 1bc8 AU Setting AU scheduled install time to 2013-12-21 10:00:00
2013-12-20 10:27:29:903 972 1bc8 AU Successfully wrote event for AU health state:0
2013-12-20 10:27:29:904 972 1bc8 AU Successfully wrote event for AU health state:0
2013-12-20 10:27:34:498 972 2bcc Report REPORT EVENT: {2519DC64-E7F9-499B-A2F8-B58DA4A0C08A} 2013-12-20 10:27:29:902-0600 1 148 101 {00000000-0000-0000-0000-000000000000} 0 8024400e AutomaticUpdates Failure Software Synchronization Windows Update Client failed to detect with error 0x8024400e.
2013-12-20 10:27:34:502 972 2bcc Report CWERReporter::HandleEvents - WER report upload completed with status 0x8
2013-12-20 10:27:34:502 972 2bcc Report WER Report sent: 7.6.7600.256 0x8024400e 00000000-0000-0000-0000-000000000000 Scan 101 Managed
2013-12-20 10:27:34:502 972 2bcc Report CWERReporter finishing event handling. (00000000)

I focused in on "GetAuthorizationCookie failure, error = 0x8024400E, soap client error = 7, soap error code = 400, HTTP status code = 200" and did some googling which all points at Microsoft Office 2003 SP1 update as being the culprit, and I followed the instructions on a technet site to disable the update and am still getting the same error. I'm stumped at this point, and I thought I would post here in the hope that someone can help me before I end up just wiping it out and reinstalling (which I'm worried won't even solve it).