You might have recently tested the technical preview of Windows 10 and realised that the OneDrive/ Skydrive client fails to start running.
Here’s the fix which might help solve the issue.

  1. Delete the folder c:\users\yourusername\onedrive
  2. Delete your user OneDrive user profile at C:\Users\yourusername\AppData\Local\Microsoft\SkyDrive\settings\ They usually end with DAT format, delete the configuration file starting with the same OneDriveID too
      • Reinstall the OneDrive Client on C:\Users\yourusername\AppData\Local\Microsoft\SkyDrive\17.3.4517.1031
Your OneDrive should start working now 🙂
Else, right click C:\Users\yourusername\AppData\Local\Microsoft\SkyDrive\SkyDrive.exe try running it in Windows 7 compatibility mode.