Make sure Windows AppLocker is not blocking Ultimate Suite components. These are two approaches that you can choose between:
- It's possible to add a rule that will allow the launch of applications signed by the 4BITS LTD. (O=4BITS LTD., L=GOMEL, C=BY) certificate. Use the AblebitsLoader.exe file from the installation folder when selecting the certificate.
![Add a rule. Add a rule.](https://cdn.ablebits.com/_img-docs/ultimate-suite-troubleshooting/applocker-add-rule.png)
- Alternatively, you can create an exception to the Deny rules that do not allow the files to run.
![Add an exception: Step 1. Add an exception: Step 1.](https://cdn.ablebits.com/_img-docs/ultimate-suite-troubleshooting/add-publisher-exception-step-1.png)
![Add an exception: Step 2. Add an exception: Step 2.](https://cdn.ablebits.com/_img-docs/ultimate-suite-troubleshooting/add-publisher-exception-step-2.png)
![Add an exception: Step 3. Add an exception: Step 3.](https://cdn.ablebits.com/_img-docs/ultimate-suite-troubleshooting/add-publisher-exception-step-3.png)
Related issues
Ultimate Suite cannot load one of its dlls
See also
Ultimate Suite troubleshooting
Let Excel create child processes