Follow these steps:

• CMD run as Administrator and

  npm uninstall -g ionic cordova

• Shutdown the system, not restarted
• Start/Boot system after sometime, removed all from TEMP folder.
• Installed the latest version of NodeJS as Administrator
• Open CMD as Administrator and updated

  npm install -g npm
  npm install -g ionic
  npm install -g cordova

After that test, It works fine with any directory.