We know that some players are experiencing issues with downloading and patching the game client.
We're working on a resolution to this now, but the workaround we have is as follows:
1)Delete everything inside the Program Files/Cryptic Studios/Champions Online/Live/prepatch/piggs folder.
2)Move all the *.hogg files from Program Files/Cryptic Studios/Champions Online/Live to Program Files/Cryptic Studios/Champions Online/Live/prepatch/piggs