http://blogs.msdn.com/b/sharepoint/archive/2010/06/22/installing-kb938444.aspx?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+sharepointteamblog+%28Microsoft+SharePoint+Products+and+Technologies+Team+Blog%29 We’ve been tracking a small number of customers that have experienced issues after installing KB938444 through Windows Update. This issue only affects Windows SharePoint Service v3 standalone installations that use the Windows Internal Database (wYukon) and does not affect SharePoint or user data.
http://technet.microsoft.com/en-us/library/cc424952.aspx Microsoft SharePoint Server 2010 supports both path-based and host-named site collections. The primary difference between path-based and host-named site collections is that all path-based site collections in a Web application share the same host name (DNS name), and each host-named site collection in a Web application is assigned a unique DNS name.
http://technet.microsoft.com/en-us/library/cc263199.aspx Many of these resources are visual representations of recommended solutions. They include poster-sized documents available in formats including Microsoft Office Visio 2007 or Microsoft Visio 2010 files (.vsd), PDF files, and XPS files. You might need extra software to view these files. See the following table for information about opening these files.