Connectify Hotspot gives me a 'Error during driver install'

This may happen when another application is blocking Connectify Hotspot's driver from installing.

If you have Kaspersky, you need to either uninstall Kaspersky or disable Self-Defense in Kaspersky. Kaspersky blocks Connectify's driver install.

Please follow the steps below to install Connectify Hotspot:

Solution A - Download https://downloads2.connectify.me/DriverInstallPermissionsFix.bat to your computer, save it as DriverInstallPermissionsFix.bat to your Desktop or Downloads folder (or wherever you like). Then double-click to run the file. It may prompt you for Administrator access. After this runs, try running the Connectify installer again.

Solution B - Make sure that the Device Install Service is not set to Disabled. The Connectify installer tries to turn it back on by itself, but a policy on your PC can stop it. To check:

Open the Services window: open the Start menu, type 'Services' and open it.
In this window, scroll down to Device Install Service.
Right-click on the entry and choose Properties.
On the General tab, make sure that Startup type is not set to Disabled. If the Startup type was set to Disabled, set it to Manual, click OK and try running the Connectify installer again. If the Startup type was already Manual or Automatic, you may proceed to the next solution.

Solution C - Save the Connectify installer to your desktop, and restart your PC in Safe Mode. Microsoft explains how here: Start your PC in safe mode in Windows.

Run the Connectify installer in Safe Mode. After this completes, you may restart into Windows normally. You may need to run the installer one more time. However, it will not need to install the driver anymore and so should complete successfully.

If this started after a major Windows upgrade (for example, from Windows 10 to Windows 11), please see Connectify stopped working after I upgraded Windows for more information.