i got same problem with a pc.
in warning.log:
04.01.2008 15:51:29 1199458289 SYSTEM 372 Function setifaceUpdatePackages() has failed. Return code is 0xC0000142, dwRes is C0000142.
08.01.2008 07:47:52 1199774872 SYSTEM 1904 Function setifaceUpdatePackages() has failed. Return code is 0x20000004, dwRes is 20000004.
i can connect to admin$, in admn i can see last contact on 09.01.2008.
i try to remote update engine and vps. i see a processing status.
after a while i see 0x20000004
in error log i see in the last line
04.01.2008 07:51:53 1199429513 SYSTEM 372 AMS conn attempt (192.168.11.48:16111) failed. AMS address locked. (error 0000274C).
the last vps update if from 03.01.2008.
what can i do??