Problems with the login window are, as a rule, related to problems with your Internet Explorer and JavaScript. Regardless which browser you are using, Skype (since version 5.5) is using Internet Explorer and JavaScript to create and manage the login screen.
In order to test if your Internet Explorer is able to execute JavaScript, do the following test:
Open in your Internet Explorer (no other browser but only IE) this page:
http://www.mistered.us/test/alert.shtml
Click on the “Simply Click This Button” button and watch the response.
If you are not receiving a positive response on this test, then this might indicate that you need to repair registration of the JavaScript components.
Go to Windows Start -> All Programs -> Accessories -> Command Prompt.
Type the following in the Command Prompt window and then press Enter:
regsvr32 jscript.dll
You should receive a message saying DllRegisterServer in jscript.dll succeeded.
Reboot your computer. Repeat the JavaScript test using your Internet Explorer.
In the case all the above attempts fail, you can apply a temporary solution, which will force Skype to use the old (legacy) login window, which does not require Internet Explorer.
Quit Skype. Make sure that you don’t see any Skype.exe processes in Windows Task Manager. If necessary, then stop these processes. Open C:\Program Files\ folder. Find the Skype folder and then Phone. Right click on the Skype.exe file and select: Send to – Desktop (create shortcut). Right click on the newly created shortcut and select Properties and then the Shortcut tab. In the Target field you will see now: "C:\Program Files\Skype\Phone\Skype.exe". Click with your mouse on the text in the Target field and move your curser one space after the last quotation sign and add the text /legacylogin. The text in the Target field should now read:
"C:\Program Files\Skype\Phone\Skype.exe" /legacylogin
Click OK to save the changes. Start Skype using this new shortcut.
