Duplicate computer name Windows XP

Hello,
I applied Security Update 2011-005 this morning. Now when my Windows XP clients are rebooted, they pop up a message "Duplicate computer name exists on the network." Looking in the XP System event log points the finger at my iMac as refusing to allow that name. Unplugging the iMac from the net fixes the issue.
I have about 200 computers inside my firewall, probably 90% Windows (either XP or 7 Pro). This problem hits multiple XP computers, all with unique names.(so, yes, my single Lion client prevents dozens of XP systems from accessing the Windows network)
I looked at the iMacs Netbios name, it is "13-155-8" which seems to be the last three octets of my dhcp IP address. (35.13.155.8) I have no idea how it came up with that, I've never bothered assigning one.
Seems to be related to Macs keep assuming Netbios names causing Windows computers to get error but the fix there doesn't apply.

Hi and welcome to Discussions,
as it seems Netflix not only needs Windows but also the Internet Explorer 6.0 or higher, so from the Mac OSX side you have no luck, since the latest IE for Mac is 5.0.
I would suggest getting BootCamp from Apple http://www.apple.com/macosx/bootcamp/
and of course a valid Windows XP SP2 or Vista license/package.
Have Fun
Stefan

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