Quick RUU Question, need to bring my phone back to TMO

I'm done with these issues that my phone is having. It keeps locking up no matter what ROM I use or how little apps I have installed. Something has got to be wrong with my phone and it's time to bring it back to TMO for repair/replacement.

I found this link on HTC to download the RUU: http://www.htc.com/us/support/rom-do...s.html#tmobile

My question is, would this be enough to bring my phone back to stock so that they don't know I've rooted it?