You may experience Windows PE download errors if your PC is behind a SonicWALL Firewall.
Example error in the Reflect download manager (ReflectDL.exe) log:
You may experience this problem if a computer is behind a firewall or behind a proxy server. This problem occurs if one of the following conditions is true:
- The proxy server environment does not support the HTTP 1.1 range request feature.
- You are behind a SonicWALL firewall device, and the "Enable HTTP Byte-Range request with Gateway AV" is not enabled.
Enable HTTP Byte-Range request
For more information see the following SonicWALL support articles:.