Reverting back to MIUI

Hey!

So I've been running RessurectionRemix for a while now and was hoping to revert back to MIUI. However this has been utterly troublesome. I've tried flashing various versions of MIUIs adapted to be flashed through TRWP but on ALL attempts it'll flash successfully only to return "No OS installed" if I attempt to reboot.

I've tried fastboot flashing images as well, and flashes here too are succesful but upon reboot stuck on the MI logo.

I'm currently running with TWRP and no OS installed.

Any sollutions & tips are appreciated.

Thanks!

Reverting back to Stock Kitkat firmware.

I'm using the stock based CleanStock firmware currently. It's a great custom rom but I want to revert back to stock KitKat rom. How can I do so. Can someone tell me the exact procedure? Please help. Thanks!

Reverting to OOS from CM13 (TWRP)

Can I restore my backup of OOS after flashing CM13 on OP2?

Or i need to flash somethings like modem before doing it?

Help For Old Guy Reverting TWRP M8 To Stock

Hey guys. Need some help remembering how to do this stuff and what info i need to get some real help sorting out my misses phone.

Ive not done this for a very long time...since i re did my old HTC HD2.

So...the misses has had her HTC One M8 for over a year now. Bought off Ebay and all is good. An update needed to be done about 6 months ago but the wife said it failed all the time. I had a look and found it had a TWRP boot loader on and a custom ROM installed (i guess). The phone will not even connect to sync manager (my original M8 will) but is seen by Windows and can view the internal storage and SD storage.

So, want to revert it back to a stock M8 image but am confused about what i need to get to make this happen.

I know my M8 is on version 6.12.401.4 and have downloaded a recovery image with that number. Also, the TWRP version on the misses phone is v2.8.6.1.

Please can someone with a lot more brain power help me to revert her phone back to stock and save me from a moaning wife (and not moaning in the good way :))

Thx in advance for any help