If the basic fixes fail, the Windows Installer service itself may need a reset: Restart Installer Service services.msc Windows Installer , right-click it, and select Re-register MSI Service
Sometimes the Windows UI detection fails. cloudflare warp setup wizard ended prematurely
There are several reasons why the Cloudflare WARP setup wizard may end prematurely. Some common causes include: If the basic fixes fail, the Windows Installer
Post on Cloudflare Community or contact Cloudflare support with those logs. If the basic fixes fail
or later installed. Older Windows versions often fail because this runtime is missing or outdated. Technical Fixes for Windows Installer