LiveUpdate sessions end with an LU1863 error stating that there is insufficient disk space to continue. The computer appears to have sufficient disk space.
LU1863: Insufficient free disk space. There is not enough free disk space for LiveUpdate to operate properly. Please free up disk space on your computer and run LiveUpdate again.
This return code can be returned for more than one reason. Some environments may experience this issue due to more than one cause. LU1835 errors are known to be caused by the following:
Proxy servers or firewalls that strip content length header information from HTTP or FTP communications
Proxy servers or firewalls that compress or encrypt file header information
Other 3rd party applications that filter Internet traffic (such as antivirus or content filtering appliances)
Low disk space on the System drive
As this issue can have more than one cause, it may be necessary to try any/all of the solutions below to resolve this issue:
Confirm that there is sufficient free space and no disk usage quotas preventing LiveUpdate from writing to its temporary Downloads folder on the %SYSTEMDRIVE% (Note: LiveUpdate can be installed to any arbitrary drive location on the system, but the Downloads directory is always located on the %SYSTEMDRIVE%).
It may be necessary to free disk space by deleting the contents of the LiveUpdate Downloads folder at:
%SYSTEMDRIVE%\ProgramData\Symantec\LiveUpdate\Downloads on Windows Vista and above
%SYSTEMDRIVE%\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads on Windows XP
Ensure that any proxy, firewall or content filtering applications or devices are configured not to filter or scan LiveUpdate traffic from the following locations:
liveupdate.symantecliveupdate.com over HTTP
liveupdate.symantec.com over HTTP
update.symantec.com over FTP
Ensure that any proxy, firewall or content filtering applications or devices are not stripping header information from FTP or HTTP traffic, especially file size header information.
Ensure that any network-based antivirus scanners are configured to exclude LiveUpdate content from scans .
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