If you are unable to sign in to Skype, the first step you should take is to update your Skype with latest version, because mostly the login issue arises due to outdated version of Skype.
If you still face the challenges after installing the latest version of Skype then go with the possible following solutions:
#1 Is your Internet Connection Working Fine
You can check your internet connection by browsing few website like skypepasswordrecovery.com. If the website get loaded quickly, it mean your internet is working fine. Sometime the website get loaded on browser due to caching, so make sure that you browse your browser in Inccognito mode.
If you are unable to load the websites at all, then please assure your device is connected properly to the network.
#2 Is Skype Down Today?
If your internet is working fine, the problem may be due to the Down of Skype server. You can check with the Skype Down Detector.
If there are no such issues reported on Skype down detector or Heartbeat, then go to the next solution.
#3 Are you able to view the sign-in screen?
If you are not getting the login screen there is some issue with Skype application. Uninstall the Skype & install it again.
#4 Have you Entered the Credentials Correctly?The best way to make sure if you are entering correct username & password is to login on Skype for web. There could be unlimited number of reasons due to which you may encountering error in sign in to Skype for desktop. If you are able to login your Skype account through web, it means credentials are working fine.
If you can’t sign in to Skype on Web also, then you should try to reset Skype Password.
#5 Is your computer up-to-date?
Your computer’s hardware or software may preventing the Skype to login your account.
#6 Have you deleted your shared.xml file?
Skype has a configuration or setting file called shared.xml, and if you have delete the file, your Skype Sign in issue may get resolved. Do not worry about the file, it get created automatically, when you login your Skype account. and in some cases deleting this file can solve sign-in problems. The file is re-created when you sign back in to Skype.
If you’ve gone through all of the above steps and you’re still facing challenges, you can try few more things:
When I tried to login Skype with desktop client a spinny animated icon displayed, then an error message appear: “Check your Internet connection”
Solution: You can restart your Router; sometime it occurs due to Skype traffic over certain routers causes issues
Solution: This may occur because of over traffic on Skype Account. For this you need to wait till the server get up.