I was stuck in a bootloop earlier with Team Win, having just gotten an older phone.
Now I'm seeing a menu like:
*** Tampered *** *** Unlocked *** ... FASTBOOT RECOVERY FACTORY RESET ...
Selecting FACTORY RESET
seems to get me to a stock-looking Android 4.4.3 with an HTC Sense version 6.0.
From the Android menu, selecting factory reset gets me back to Team WIN scripts, and then back to Android well enough. However, I previously stuck in a loop of Team WIN:

This phone came with Team WIN, which is fine. My inclination is to format and re-install as it was installed by another. What's the general procedure? Is it any simpler as Team WIN is already installed?