STEAM GG

Looks like it's your internet connectivity, as the error notes. I've never had trouble with downloading updates or Steam games, and they always download at my max download rate. I'm assuming it's not on their end. Maybe it begins to download and then your internet cuts out and corrupts it or something.

Have you tried deleting the blob file? Doing that usually fixes issues like this.

i had that this morning, delete everything from the steam folder except steam.exe and steamapps and open the steam shortcut and it will redownload

Clicky

Just run SteamTmp.exe, it will bypass that and start Steam normally until an update fixes the problem.

Re install can never hurt.

Try restarting the computer??

It's not Steam but your connection that is the problem.

If you know what you're doing, go into regedit and find the offline flag for Steam. Set it to 0 and retry. Running a fever atm, so can't really find it for you, but it's not that hard. If you're still having trouble, I can help more tomorrow.

I had that on Linux once i signed in for the beta, go into the desktop Steam shortcut and add -clearbeta
At worse, uninstall and re-install it, remember to move your steamapps and userdata folder out to the desktop.

Are you still having this problem mate?

I understand your frustration, but people would be more willing to help if you weren't a whiny douche about it. Probably firewall settings or some such. Try running in administrator mode. Also try bypassing your router if you have one.

I also got this problem...I presume that their servers are overloaded since this update is quite bigger than usual.
SteamTmp.exe solution is working for me. At least I'll wait one-two days until there's not much load.

Thread should be closed.