OK, with you now, the Support software download is notoriously unreliable, many attempts are not uncommon, very slow download speeds are also frequent. Be patient with it. It can take hours so wait until it finishes, or fails with an error.
You can try going to System Preferences>Network>Advanced>Proxies, uncheck everything in the protocol box and try with and without Passive Mode checked (below the protocol box)
I've gone through that process, recloned using CCC again and then through that whole process. The progress bar for Windows support software never shows any progress at all. I've left it going for over a half hour and still nothing - even after using the Proxies route as well. Is there a copy of Bootcamp that I can get on this site that may help? Still trying to figure other routes that may fix that glitch for downloading.
It really is not an OS bug and won't be fixed that way. The servers supplying the Support Software have been bad for some time, but most people persevere through it, I have downloaded it in 45 minutes, and also in hours, it's a crapshoot.
Also please search this forum, there is a posted link to an alternative (unsupported) download. Use at your own risk.