SmartScreen is a security feature built into Windows 10. Sometimes, SmartScreen blocks the installation of Pixtel.msi and shows the following warning window. Click on 'More info' and click on 'Run anyway' button to continue with the installation.
You should see Pixtel.msi as the App name and Vantif LLC as the Publisher name.
You can also try the following recommendation from Microsoft:
There's a possibility that the SmartScreen option is on that's why you're unable to install downloaded apps. Let's try to turn it off and see if it helps. See the steps below:
- Open Windows Defender Security Center from your Start menu, desktop, or taskbar.
- Click on the App and browser control button on the left side of the window.
- Click on Off in the Check apps and files section.