Hi. Here is the solution:
"Download, but don’t run this installer for the latest 6.5.0.158 version.
http://download.skype.com/msi/SkypeSetup_6.5.0.158.msi
extract the Skype.exe file from the SkypeSetup_6.5.0.158.msi file and replace your currently installed Skype.exe with this new Skype.exe file. (...)"
"(...)you should know that the only what is required to have a working Skype program is one single file – Skype.exe, nothing else."
http://community.skype.com/t5/Windows-desktop-client/Installing-Skype-failed-code-1632/td-p/1716322
http://community.skype.com/t5/Windows-desktop-client/How-to-update-Skype-without-using-any-Skype-installer/m-p/707359