Paul - I verified the Default Access Permissions in dcomcnfg and they were correct. I then set up the scheduled task to test the System account rights. Here's the info from the liveupdate log: (I've got well over 100gb of space available on the server.)
4/24/2009, 15:07:22 GMT -> Progress Update: PATCH_DOWNLOADING_START: Number of patches: 1
4/24/2009, 15:07:22 GMT -> GetUpdates: Symantec AntiVirus Corporate Server, 10.1, SymAllLanguages ==> 1240579322jtun_sav10_ennluxdb.x86
4/24/2009, 15:07:22 GMT -> Progress Update: DOWNLOAD_BATCH_START: Files to download: 1, Estimated total size: 53717882
4/24/2009, 15:07:22 GMT -> Update file 1240579322jtun_sav10_ennluxdb.x86 may be divided into bandwidth reducing segments.
4/24/2009, 15:07:22 GMT -> Progress Update: DOWNLOAD_SEGMENT_BATCH_START: Downloading segmented file 1240579322jtun_sav10_ennluxdb.x86.full.zip (size 53717743) instead of update file
http://liveupdate.symantecliveupdate.com/1240579322jtun_sav10_ennluxdb.x86 (size 53717882)
4/24/2009, 15:07:22 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_START: Downloading segment file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg1.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:22 GMT -> Progress Update: DOWNLOAD_FILE_START: URL: "1240579322jtun_sav10_ennluxdb.x86", Estimated Size: 3584000, Destination Folder: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads"
4/24/2009, 15:07:22 GMT -> HttpSendRequest (status 200): Request succeeded
4/24/2009, 15:07:22 GMT -> Download complete: Original estimated file size: 3584000; Actual bytes downloaded: 3584000
4/24/2009, 15:07:22 GMT -> Progress Update: DOWNLOAD_FILE_FINISH: URL: "1240579322jtun_sav10_ennluxdb.x86", Full Download Path: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg1.zip" HR: 0x0
4/24/2009, 15:07:22 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_END: Downloaded file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg1.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:22 GMT -> Progress Update: SECURITY_PACKAGE_TRUSTED: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg1.zip"
4/24/2009, 15:07:22 GMT -> Reaching the end of MergeChunkFile, number 1, full:C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.full.zip, seg:C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg1.zip, return: 1
4/24/2009, 15:07:22 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_START: Downloading segment file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg2.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:22 GMT -> Progress Update: DOWNLOAD_FILE_START: URL: "1240579322jtun_sav10_ennluxdb.x86", Estimated Size: 3584000, Destination Folder: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads"
4/24/2009, 15:07:22 GMT -> HttpSendRequest (status 200): Request succeeded
4/24/2009, 15:07:23 GMT -> Download complete: Original estimated file size: 3584000; Actual bytes downloaded: 3584000
4/24/2009, 15:07:23 GMT -> Progress Update: DOWNLOAD_FILE_FINISH: URL: "1240579322jtun_sav10_ennluxdb.x86", Full Download Path: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg2.zip" HR: 0x0
4/24/2009, 15:07:23 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_END: Downloaded file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg2.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:23 GMT -> Progress Update: SECURITY_PACKAGE_TRUSTED: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg2.zip"
4/24/2009, 15:07:23 GMT -> Reaching the end of MergeChunkFile, number 2, full:C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.full.zip, seg:C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg2.zip, return: 1
4/24/2009, 15:07:23 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_START: Downloading segment file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg3.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:23 GMT -> Progress Update: DOWNLOAD_FILE_START: URL: "1240579322jtun_sav10_ennluxdb.x86", Estimated Size: 3584000, Destination Folder: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads"
4/24/2009, 15:07:23 GMT -> HttpSendRequest (status 200): Request succeeded
4/24/2009, 15:07:23 GMT -> Download complete: Original estimated file size: 3584000; Actual bytes downloaded: 3584000
4/24/2009, 15:07:23 GMT -> Progress Update: DOWNLOAD_FILE_FINISH: URL: "1240579322jtun_sav10_ennluxdb.x86", Full Download Path: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg3.zip" HR: 0x0
4/24/2009, 15:07:23 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_END: Downloaded file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg3.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:23 GMT -> Progress Update: SECURITY_PACKAGE_TRUSTED: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg3.zip"
4/24/2009, 15:07:23 GMT -> Reaching the end of MergeChunkFile, number 3, full:C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.full.zip, seg:C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg3.zip, return: 1
4/24/2009, 15:07:23 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_START: Downloading segment file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg4.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:23 GMT -> Progress Update: DOWNLOAD_FILE_START: URL: "1240579322jtun_sav10_ennluxdb.x86", Estimated Size: 3584000, Destination Folder: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads"
4/24/2009, 15:07:23 GMT -> HttpSendRequest (status 200): Request succeeded
4/24/2009, 15:07:24 GMT -> Download complete: Original estimated file size: 3584000; Actual bytes downloaded: 3584000
4/24/2009, 15:07:24 GMT -> Progress Update: DOWNLOAD_FILE_FINISH: URL: "1240579322jtun_sav10_ennluxdb.x86", Full Download Path: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg4.zip" HR: 0x0
4/24/2009, 15:07:24 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_END: Downloaded file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg4.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:24 GMT -> Progress Update: SECURITY_PACKAGE_TRUSTED: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg4.zip"
4/24/2009, 15:07:24 GMT -> Reaching the end of MergeChunkFile, number 4, full:C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.full.zip, seg:C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg4.zip, return: 1
4/24/2009, 15:07:24 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_START: Downloading segment file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg5.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:24 GMT -> Progress Update: DOWNLOAD_FILE_START: URL: "1240579322jtun_sav10_ennluxdb.x86", Estimated Size: 3584000, Destination Folder: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads"
4/24/2009, 15:07:25 GMT -> HttpSendRequest (status 200): Request succeeded
4/24/2009, 15:07:25 GMT -> CstInetGetFile::DoHTTPTransfer - Unable to retrieve content length header for file being downloaded from server; err=12150; desc=The requested header was not found
.
4/24/2009, 15:07:25 GMT -> ERROR: Insufficient free disk space is available to continue downloading the file '1240579322jtun_sav10_ennluxdb.x86.seg5.zip'.
4/24/2009, 15:07:25 GMT -> Progress Update: DOWNLOAD_FILE_FINISH: - NOTE - URL: "1240579322jtun_sav10_ennluxdb.x86", Full Download Path: "C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\1240579322jtun_sav10_ennluxdb.x86.seg5.zip" HR: 0x802A004D
4/24/2009, 15:07:25 GMT -> HR 0x802A004D DECODE: E_INSUFFICIENT_FREE_SPACE_TO_DOWNLOAD_FILE
4/24/2009, 15:07:25 GMT -> Progress Update: DOWNLOAD_SEGMENT_FILE_END: Downloaded file
http://liveupdate.symantecliveupdate.com/segments/1240579322jtun_sav10_ennluxdb.x86.seg5.zip instead of update 1240579322jtun_sav10_ennluxdb.x86: file size 3584000
4/24/2009, 15:07:25 GMT -> Progress Update: DOWNLOAD_SEGMENT_BATCH_FAILED: Download of segmented file 1240579322jtun_sav10_ennluxdb.x86.full.zip (size 53717882) failed. LiveUpdate will download the full update file
http://liveupdate.symantecliveupdate.com/1240579322jtun_sav10_ennluxdb.x86 (size 53717743)
4/24/2009, 15:07:25 GMT -> Progress Update: DOWNLOAD_SEGMENT_BATCH_END: Downloaded segmented file 1240579322jtun_sav10_ennluxdb.x86.full.zip (size 53717743) instead of update file
http://liveupdate.symantecliveupdate.com/1240579322jtun_sav10_ennluxdb.x86 (size 53717882)
4/24/2009, 15:07:25 GMT -> Progress Update: DOWNLOAD_BATCH_FINISH: HR: 0x802A004D, Num Successful: 0
4/24/2009, 15:07:25 GMT -> HR 0x802A004D DECODE: E_INSUFFICIENT_FREE_SPACE_TO_DOWNLOAD_FILE