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Sophos NAC Advanced: NAC Agent fails to register on some computers running IE 7.x and using a proxy for Internet access

The NAC Agent fails to register on some computers running IE 7.x and using a proxy for Internet access.

What to do

If the computer is running IE 7.x and is using a proxy for Internet accesss, run the proxycfg.exe -u command from a command line on the computer. Restart the computer once you have run the command. When the computer restarts, the NAC Agent should register successfully.

The following Microsoft knowledgbase articles have information relating to this issue.

http://support.microsoft.com/kb/841641/en-us
http://support.microsoft.com/kb/317541/en-us

If you need more information or guidance, then please contact technical support.