Whoops! Looks like something broke. Error Code: 2600
This can be caused by a bad download, which can be the result of a proxied web connection.
Proxies, particularly caching proxies, can translates the Blizzard downloaders HTTP request with the Range header into a full request, which is subsequently returned as is to the client i.e. 200 OK response containing the full file. The downloader was expecting a 206 Partial Content response but appears to only check for 20X response, hence it doesn’t spot the issue and builds its full file incorrectly.
To make matters worse the downloader stores this file in the Windows temporary directory and doesn’t delete it either on failure or before trying to download it again such as if the installer is restarted.
If you’re using nginx prior to 1.5.3 as a caching proxy then this will happen if your the first person to download the file, after which 206 responses are correctly returned for Range requests using the cached file. This behaviour was changed in 1.5.3 when an enhancement to return 206 for on the fly caching responses was added. To be clear this isn’t technically a bug in nginx, the spec allows for a server to return 200 OK response to a Range request, its the Blizzard downloader that’s at fault for not correctly processing 200 OK then its expecting 206 Partial Content.
If you have your Battle.Net installer bugged like this simply delete the Blizzard directory from your Windows temporary directory %TEMP% and re-run the installer after fixing or disabling your proxy.
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