To perform the MSCONFIG procedure:
Windows 10 and earlier:
Press and hold the Windows® key and R keys at the same time. This should open the Run dialog box.
Type MSCONFIG and click OK. This should open the System Configuration Utility window.
Click on the Services tab and check the Hide All Microsoft Services checkbox near the bottom. Do not continue unless the box is checked.
Click Disable All.
Next go to the Startup tab and click Disable All.
Click OK and restart your computer.
Once Windows® is back up go ahead and try launching Blade and Soul again (without opening any other programs).
Important Note: If you need a specific application to run with Windows® but still want to use MSCONFIG, you can follow the above instructions and on step 4, re-check any application that needs to start with Windows® programs you would want to do this for include:
Wireless Connection Software
Mouse or Keyboard Applications