After the update I can't log in or even create a new account. Can something be done about...

Yes, I can login at the website, and the network connection is functioning fine the console downloads updates and stuff. After the hard restart, my profile is initially logged in but within a few seconds I get a message something went wrong with that same
error code. 0x80045C01.

If I do a hardreset with the network intentionally off my profile will be logged in until I restore the network connection.

Edit: Still can't login on my xbox, If I create a new account that one can login and out but not my actual account.

In the end I solved the problem my removing and readding my account to the xbox.

I can't even create an account on the website ( www.callofduty.com/founder ). I was under the assumption that you needed to create an account online before logging in??? I try to create an account, hit 'next' and the screen just goes white with nothing
on it. Anyone else? Am I doing something incorrectly?

You can always create a new account. But switching emails is not something that can be done, Infernix.

i'm now able to log in to xbox live..what i did was i changed my password using the forgot password prompt..after creating a new one, i just thought about deleting the dashboard update..after restarting, i was able to log on..never prompted me to download
the update again after deleting it.

I play on PlayStation and the account that’s linked to it is deleted and still says log in with said deleted account

Unfortunately theres nothing that can be done about that because Sony only lets you link a single Microsoft account to your PSN for Minecraft.

Even if you could unlink the old Microsoft account, Sony wont let you link a different one.

The only option is to create a brand new PSN account and link a new Microsoft account to that.