Failed to get proc address for GetLogicalProcessorInformation (KERNEL32.dll).
Skype 6.7 is the first version to require the GetLogicalProcessorInformation function. The problem is that this function is introduced to Windows XP in SP3. This is why even the official system requirements for Skype say that we need Service Pack 3 for XP.
Solutions to the problem
Install Service Pack 3
More on how to get Service Pack 3 see on this page.