Update error: 0x8024400a

Hi!
I'm having trouble getting Windows Defender beta 2 to download updates. When
issuing the command, it takes a while and a message saying: "Windows Defender
was unable to complete the update: 0x8024400a" is displayed.

My system is a Fujitsu-Siemens T4010D running MS Windows XP Tablet PC
Edition 2005 Version 202, SP2.
Have tried to connect thru both my wireless and cabled network.

Windows Defender Beta 2 runs perfectly on my second Tablet PC (same as
above) and my home pc. No problems downloading updates.

TIA,

Svein Egseth