Cannot re-install or update Skype

Until about a week ago, everything was working fine. Then I got a notification saying there was a new update for Skype. I tried to install it, but I got an error message saying another version of Skype was already installed. I tried uninstalling and reinstalling Skype but it (along with many other applications) does not appear in my Control Panel to allow me to reinstall it. I've deleted every folder and program I can find related to Skype, including sifting through and deleting everything in the Registry, and I still get this error when I try to reinstall Skype. I have also tried to install Skype with the .msi file, and I still get this error. Please help, this is really frustrating.
The error message is Code 1638.
I am running Windows 7.
Solved!
Go to Solution.

Try to clear any currently installed version using this MS Fix It:
http://support.microsoft.com/mats/Program_Install_and_Uninstall/en
If this will still not work, then try this Skype removal tool:
http://community.skype.com/t5/Windows-desktop-client/Cannot-remove-old-version/m-p/3668091#M30451...
Reboot your computer and try now to install the latest Skype version.

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Unable to install or update Skype.

Hello M/S Skype Support. I am using Windows 8.1 OS and just now I have opened Skype from my start window, It said me to update, and when I downloaded the skype and started installing I got a popup message that " Installing Skype failed: code 1638Another version of this product is installed. Installation of this version cannot be continued. To Configure or remove the existing product, use Add/Remove program in control panel . " I didn't found Skype in Add/Remove Program.Neither I have Folder of Skype in Program files(x86) Please do help me to install Skype. Regards.Jamal uddin Mohammed.[e-mail removed for privacy and security]

Got resolved to the above problem. Had support with microsoft. Resolved by fixing with microsoft fix.

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