New answers tagged unrooting
When starting your phone in step 2 of your example, hold the volume down only. Once the warning screen appears, then press volume up.
First, there is no such thing as a "full copy" of the system stored anywhere on the device, as it is with the Windows recovery partition you describe. Neither is there a "program which reinstalls the android operating system from scratch" stored on the device, so you could back that up (installation is always done via rom-flashing, which takes care of ...
I was facing the similar issue with whatsapp, finally found out the simple solution Settings -> Accounts & sync -> ENABLE this
No Root wont removed by factory reset. But if you want to remove it then you should have to flash stock ROM or delete the su binary from the system/bin and system/xbin and then delete the Superuser App from the system/app.
Check out this link that is what you want:HTC
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