The "SOLIDWORKS host file block install" issue typically occurs when the Windows prevents the SOLIDWORKS Installation Manager from communicating with activation or download servers. This block can manifest as a blank installation screen , connection errors, or activation failures. Understanding the Role of the Hosts File
The primary reason for "blocking" via the hosts file during a SOLIDWORKS setup is to prevent the software from attempting to phone home to a server that is causing the installation to hang. solidworks host file block install