Installing Client Security 14.x getting Overlapped I/O error


During installation of Client Security 14.x we are receiving a notification saying Overlapped I/O operation is in progress.
Running the uninstallation tool between attempts has no impact.


This points towards a Microsoft-related issue which can be remedied by renaming a Microsoft folder, running our uninstallation tool and reinstalling Client Security.
To verify this, look for events with ID 997 within the Windows Event Viewer.
Steps to resolve:
  1. Rename the following folder C:\ProgramData\Microsoft\Crypto\RSA\S-1-5-18 to C:\ProgramData\Microsoft\Crypto\RSA\S-1-5-18_BAK
  2. Run the F-Secure uninstallation tool:
  3. Remove any F-Secure folders and files from C:\Program Files (x86), C:\Program Files and C:\ProgramData
  4. Delete all F-Secure registry entries from the Registry Editor:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Data Fellows
  5. Re-install F-Secure Client Security onto the host

Article no: 000016801

Pricing & Product Info

For product info and pricing please go to the F-Secure product page

Version history
Revision #:
2 of 2
Last update:
‎09-10-2019 01:08 PM
Updated by: