Event ID 63

I can't install/activate TRIAL VERSION Office Home and Student 2007.

Event Viewer/Apllication contains the next message (Event ID 63):

A provider, OffProv12, has been registered in WMI nameplace,
Root\MSAPPS12, to use the LocalSystem account. This account
is privileged and the provider may cause a security violation
if it does not correctly impersonate user request.

It's described at:
http://support.microsoft.com/kb/891642/en-us

What should I do to fix the problem?