root your phone and use the clockwheel method to reflash your firmware.
Ive done it on my previous phone, my HTC sensation XL (android based too so the process should be more or less the same). Admittedly I rooted and reflashed to allow me to get an unavailable firmware upgrade, not for some sort of error, but i dont imagine that will make a difference.
look on the XDA developers forum, you will likely get a stepbystep method to both root and reflash the firmware
If your not sure I would leave it though, you can brick your phone when you do this.