Driver or Software Not Installed Properly

• Missing or incorrect installation of the USB token driver can prevent detection.
  
• The Digital Signature Utility tool or Cryptographic Service Provider may be outdated.
  
• Incompatible or incomplete installation leads to DSC malfunction.
  
• The system may fail to read the DSC if drivers are not recognized.
  
• Reinstallation with the correct versions often resolves the issue.
  

Browser Compatibility Issues

• Some government portals only support specific browsers for DSC use.
  
• Modern browsers may block required plug-ins or applets.
  
• Incompatible security settings may prevent token access.
  
• Pop-up blockers or disabled JavaScript can interfere with signing.
  
• Using supported browser versions is essential for smooth operation.
  

Token Not Detected by System

• Faulty USB ports or connection problems may prevent detection.
  
• The USB token may be physically damaged or corrupted.
  
• System drivers may not recognize the cryptographic device.
  
• Token services may be stopped or disabled in the background.
  
• Checking hardware and restarting token management services may help.
  

Expired or Revoked Certificate

• An expired DSC will not function for signing or authentication.
  
• Revoked certificates are blocked by systems and portals.
  
• Users may not be aware of the certificate’s status.
  
• Verification through a certificate viewer or management tools is necessary.
  
• Renewal or reissuance is required for continued use.
  

Wrong Certificate Selected or Registered

• Multiple certificates installed on a system may confuse.
  
• Selecting the wrong certificate leads to invalid signature errors.
  
• DSCs must match the registered PAN, email, or user ID.
  
• Misaligned details cause authentication failures on portals.
  
• Clearing unused certificates or verifying selections is advisable.
  

Missing Administrator Privileges

• System restrictions may prevent the proper installation or use of DSC drivers.
  
• Lack of administrative rights can block changes to system settings.
  
• Installation of drivers or tools may fail silently without error.
  
• Running the installer as an administrator resolves most permission issues.
  
• IT support may be required in restricted environments.
  

Antivirus or Firewall Blocking DSC Access

• Security software may block token services or signature tools.
  
• Active antivirus settings may interfere with token recognition.
  
• Firewalls may prevent a connection between the DSC and the browser.
  
• Temporarily disabling or configuring antivirus may be necessary.
  
• Ensure trusted applications are allowed through the firewall.