Error 0xC800021F
You see the following error in %Windir%\WindowsUpdate.log
SYMPTOMS
2006-06-15 17:02:23 2104 83c Misc =========== Logging initialized (build:
5.8.0.2469, tz: -0400) ===========
2006-06-15 17:02:23 2104 83c Misc = Process: C:\WINDOWS\system32\wuauclt.exe
2006-06-15 17:02:23 2104 83c Misc = Module: C:\WINDOWS\system32\wuaueng.dll
2006-06-15 17:02:23 2104 83c DtaStor FATAL: Failed to initialize datastore,
error = 0xC800021F
2006-06-15 17:02:23 2104 83c Misc =========== Logging initialized (build:
5.8.0.2469, tz: -0400) ===========
CAUSE
It looks like the client datastore failed to initialize.
WORKAROUND
1. Open a CMD prompt on the client.
2. Type "net stop wuauserv" (without quotes) <hit enter>.
3. Type "cd %Windir%\SoftwareDistribution".
4. Type "RD /s /q Datastore" (this will remove the client datastore).
5. Type "net start wuauserv" (without quotes) <hit enter> .
6. Type "wuauclt /detectnow" then check %Windir%\WindowsUpdate.log if it is successful.
OR, just stop the Automatic Updates Service and delete "%Windir%\SoftwareDistribution\DataStore" folder and start Automatic Updates Service and force the update detection (wuauclt /detectnow)