Vista - Windows Crashed--Fix Recommends kb938979 Update Already Installed

Moved this post from Windows Update.

Running windows vista home premium 32 bit. Windows crashed today. In
problems and solutions recommended install kb 938979, but I installed it
November 30, 2007.

Windows Vista SP1 NOT installed. Running McAfee Security Center. I was
just surfing the internet when this problem occurred.

How can this be recommended to fix a problem when I
already have it?

Problem Event Name: APPCRASH
Application Name: lsass.exe
Application Version: 6.0.6000.16386
Application Timestamp: 4549afbe
Fault Module Name: schannel.dll
Fault Module Version: 6.0.6000.16508
Fault Module Timestamp: 46773a78
Exception Code: c0000005
Exception Offset: 0000900b
OS Version: 6.0.6000.2.0.0.768.3
Locale ID: 1033
Additional Information 1: 3cad
Additional Information 2: 603320a660f8d28eed64160841a8748a
Additional Information 3: cdcc
Additional Information 4: 63bda67c761a6a21c7a94aff59dfc0bf

Extra information about the problem
Bucket ID: 511772519
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motowngirl