how to unroot my evo

[interhawk1]

ok so i have looked all over for a stable way to unroot my evo and i am beyond frustrated nothing is working for me i need someone to link me a stable unroot method please because i cant get anything done and ive been going at this for 8 hours and i have to return my phone to sprint tomorrow

PLEASE HELP!

 

[VDub2174]

Did you try the [How To] Unroot and return to stock [RUU Method] sticky already?

 

[PM-Performance]

I didnt follow a sticky, but I found a link with RUU downloads.
i downloaded a 3.70 RUU and renamed to pcimg36.zip and did the update in bootloader.
Let it boot up and then searched for update for GB and let fate take its course.