From: Curious Marc <curiousmarc3 at gmail.com>
On Windows 7, using regedit, set
?HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\LMCompatibilityLevel? to
?1?
You might need to create the new entry under \lsa as a REG_DWORD, set to 1
As your friendly neighbourhood infosec type, please be aware that this
setting opens a rather nasty set of possible security issues. Fine on
your lab network, but you probably don't want a machine configured
like that on a possibly hostile network.
KJ