Skype released Skype 5.10 for Windows on August 14, 2012, which comes with some new functionalities and features to enhance the Skype experience. The update includes:
Voice and video calling your Facebook friends from Skype
Finding your Facebook contacts more easily and faster with the new contacts lists
Tagging the contacts you talk to most often as Favorites
In order to make it simple and fast for Skype users to upgrade to the latest version of Skype for Windows, we have integrated Skype into Microsoft Updates. If you have Skype installed on your PC already, either directly from www.skype.com or a pre-installed version on your PC, you will receive the latest version of Skype through Microsoft Updates.
To check if Skype is already installed on your PC
Click the Start button, click Run, type regedit in the Run window, and then click OK.
On the left hand pane of the Registry Editor window, find HKEY_CURRENT_USER\Software\Skype\Phone.
If the registry key exists, click the Phone folder.
In the right hand pane of the Registry Editor window, you should see an entry entitled SkypePath. The value under the Data field will tell you exactly where on your computer Skype is installed.
If the key, SkypePath, does not exist, check if it exists in HKEY_LOCAL_MACHINE\Software\Skype\Phone. Repeat steps 3-4.
Note: If the HKEY_CURRENT_USER key does not exist but the HKEY_LOCAL_MACHINE key is present, Skype has been installed from an administrator account but not been used from the current account.
If you’re planning to upgrade from an earlier version of Skype for Windows, you can learn more about the updates on the Skype Garage blog. The Archives section of the blog contains detailed information on previous updates. The Skype Garage blog is available in English only.