This message can appear after a Windows Update, or after upgrading to Windows 10. To fix the problem, you can:-
- Right-click on the “Cashbook Complete” icon
- Choose “Run as Administrator”
- If you see a message that says, “Do you want this program to allow changes to your computer”, click “Yes”
If the problem continues after that, or if you can’t start Cashbook Complete without having to choose “Run as Administrator” each time, then make sure you’ve installed the latest version. Upgrades are free.