Android died after update. TF103C. How can I bring it back to life?

[AC Question]

Android died after update. TF103C

I have Asus Transformer pad TF103C, and i installed system update. Since then, android is dead. When I turn it on, there is infinite loop of error messages saying, that com.android.systemui process has been stopped. When screen turns off after not clicking pointlessly on messages, it's dead as it can be. It doesn't even respond to power button.
I don't know, what version of android is currently installed, since i can't check it on device. Before update I probably had WW_V11.2.2.22 (2014/12/25), but i can't say for sure. It was original android installed by vendor. No updates.
I've read, that in order to recover system from downloaded ROM, I need rooted android (Best design ever. NOT.). All methods i have found is kind of scary to do, because they rely on doing some steps on android, which is being rooted, and they don't specify results of abandoning process halfway through. And guess what - i can't do anything when system is dead. Is there any way to root (or fix) system by doing everything on computer via usb cable? Assuming, that android would want to do anything with usb in its sorry state...
Help.

 

[B. Diddy]

Re: Android died after update. TF103C

Welcome to Android Central! Was this an official system update from ASUS pushed over the air? Or did you try to manually install an update?

 

[lt64]

Re: Android died after update. TF103C

That was installed by automatic updates. I did not download or install that manually.

 

[lt64]

Waste of time.