"I accepted a system update this morning, and when the phone was resetting itself it froze on the screen with the Android logo. I've tried taking the battery out, leaving it for a while and then replacing it and turning it on again, but the same thing just keeps happening. I don't know what to do!"

"The next step is to try a hard reset as described on this page:

http://www.htcwiki.com/page/Hard+Resets+for+PPC+and+Smart+Phones"