Skype – an application that started as an easy IM and VoIP client has now turned into something much more, a staple for nearly every person’s phone and computer and therefore the communication medium employed by the bulk of the company world.
Unfortunately, many of us have reported Skype software won't open in Windows 8 and Windows 10, and many users who successfully launched the program are unable to sign in to it with their Skype credentials.
Before proceeding with any of these steps, try downloading and installing the desktop version of Skype. But if you have already got the desktop version and it is not opening, then proceed with the steps given below.
Try to launch and sign Skype in safe mode
Press the Windows key + R to open a Run dialog, type msconfig.exe into the Run dialog and press Enter to launch System Configuration.
Navigate to the Boot tab of System Configuration.
Check the box next to Safe boot to enable the choice, they also enable the Network option underneath it.
Click on Apply then OK, and click on Restart within the resulting popup to restart your computer in Safe Mode with Networking.
When your computer boots up, it'll be in Safe Mode. Launch Skype and see if it started correctly and sign you in successfully.
If the matter still persists, press the Windows logo key + R to open a Run dialog once more, type %appdata% into the Run dialog and press Enter.
Locate the folder named Skype, right-click on that, click on Rename within the resulting context menu, rename the folder to Skype_2 and press Enter.
Close the File Explorer to launch Skype to check whether or not the difficulty you were experiencing has been resolved.
Repeat steps 1 and 2, disable the Safe Boot option, click Apply, click OK, and click Restart within the resulting popup to restart your computer in normal mode.