An issue was found in the way that KB929852 was directing users to disable IPv6 in Windows. If using the Fix-it from the article to disable IPv6 globally or if the manual steps were followed; the change could cause up to a 5 second delay in boot up time for Windows. The registry value HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpip6ParametersDisabledComponents should be set to a DWORD value of 0xff, not 0xffffffff.
The KB article and Fix-it has been updated to reflect the change.
For more information on disabling IPv6 from Group Policy see the following wiki article.