Skype problem with error code 2738

Try now this:

Go to Windows Start -> All Programs -> Accessories -> Right click on Command Prompt, select ‘Run as administrator’.
In the Command Prompt type:

and press Enter.
Next type this and then press Enter:

Next type this and then press Enter:

Next type this and press Enter:

After each Enter you should receive a message saying that DllRegisterServer in XXX.dll succeeded.
Reboot your computer.
Make now the test showing if your Internet Explorer can execute JavaScript.
Open in your Internet Explorer (no other browser but only IE 32-bit version) this page:
http://www.mistered.us/test/alert.shtml
Click on the “Simply Click This Button” button and watch the response.

If you cannot run skype:

Skype will not work without your IE being able to execute JavaScript.
Try now to uninstall IE11 and reinstall IE9.
In order to uninstall IE11 you should go to Windows Control Panel -> Program and Features -> View installed updates -> Microsoft Windows -> Windows Internet Explorer 11.
http://techdows.com/2012/11/how-to-downgrade-from-ie10-to-ie9-or-ie8-windows-7.html
Just look for IE11 instead of IE10.

if nothing works

exit Skype

run