[Q] Nexus 10 stuck in boot after attempting root topic

Hi.

So, a quick overview. My laptop suddenly stopped recognizing my Nexus 10 while in the midst of transferring some files over. I decided to finally root. I used the cf-autoroot tool for Nexus 10 Lollipop. The last step of the rooting involves an automatic reboot. Now my Nexus 10 is stuck in the boot.

Details:

theunlockr (DOT) com/2014/11/22/how-to-root-the-nexus-10-on-android-5-0/
That is the guide I used, including the linked cf-autoroot. Sorry for the formatting, I don't have enough posts to post links.

My Nexus 10 is stuck on the step where it shows the four circles moving around. Not sure if that's important.

The cf-autoroot appeared to work successfully except for a piece in the middle that reads:

Same problem. The procedure seemed to go well, except maybe the mounting failed? It says:

Mounting...
- System
- Cache
--- Fail

I tried using the tool several times on two computers, and did my best to update drivers directly from Google (it appears the drivers are all up to date).

My Nexus 10 was on Lollipop. As far as I know, it was up to date, so I think that means it was on 5.0.1

Help?

Attempting to remove cynogenmod cannot re lock bootloader or reflash recovery topic

I was having issues with my version of cynogenmod (apps crashing, random reboots) so I decided to downgrade to an earlier update of it. While doing this my phone restarted I guess corrupting whatever was on there. It won't boot and gets stuck at the HTC logo. I can still enter HBOOT, so I tried reflashing ROMS in CWRM from there this was presenting errors also, so I used CMRW to clear out the partitions on the phone. I then thought reflashing to recovery would help it didnt I now cant enter recovery at all it just goes to fastboot. I also tried to flash a stock recovery ROM, that also did nothing. Trying to lock the bootloader also throws an error "FAILED status read failed <no such file or directory>". So im stuck as to what I can do from here I just want to put it back to stock and forget CM until more stable releases are out. I hope I haven't made a brick, any help is appreciated.