Topic: Wii U bricking would be more worse after update?

What happen if downloads is running/install in background and one of my game froze, would my Wii U will be bricked? Or in sleep mode, I unplug without knowing the downloading running and will it be bricked too?

No. The only way your Wii U will brick is if you throw a brick at it, or build a house out of bricks and use the Wii U as a brick.
In otherwords, don't be worried. Nintendo's got your back with a warranty, and system bricks only happen like 0.01% of the time, and it's because people unplug things when they shouldn't.
The update is to make the Wii U run better, not worse.

Downloading updates shouldn't brick it. Unplugging during the install should hurt it

I don't think you have to worry about bricking being more worse. I think it will be less worse.

This is a total guess...but i'm thinking only games and apps will be allowed to install themselves automatically while you are using the Wii U or it is in sleep mode. And I really doubt a failed game install would brick the console.

Something going wrong during a firmware update is much more serious... but I gotta believe Nintendo is smart enough to not allow firmware updates while the system is in use (playing a game, watching a movie....) or in sleep mode. Seems pretty risky.

Right, I don't think a system update could actually BE installed while the system is in use anyway (that'd be like trying to install a new version of Windows right on top of an old version of it that you're literally using at that moment...it ain't happening).

. . . And yet I managed to do just that (Downloading with the Wii U). Surprisingly, declining the first 1-hour update pops up a menu to "continue downloading in the background."

That said, the system probably sandboxes updates until they have been downloaded successfully, after which point, they are able to be installed.

Eh? That's what he said, that you don't install while playing a game, you just download it. You cannot install anything while doing anything else at the moment. Though Nintendo said it's coming update allows that, so I'm curious how it will handle that...

Topic creator, the ONLY risk of bricking your console is when you are installing an update, and that is only depending on what the update is for. It has to pertain to pretty important processes that the WiiU needs to even function, hence why the initial update when the console launched was able to kill consoles. If it's just a 'stability' update or whatever, it won't brick.

Why would you play a game when you know you're downloading/installing a major system upgrade? Doesn't make any sense to me at all. You know exactly that you'll be downloading/installing a significant firmware update.

The Only Way Nintendo could brick your Wii U: Hacking it.
As long as you don't use hacks,No bricking for you!