After rooting my phone (HTC Bolt), I foolishly deleted some bloatware applications without backing them up. One of them was TouchPal, a preinstalled keyboard app. I didn't think this would be much of a problem because I already had it disabled in settings and was using a separate keyboard app for other purposes.
However, when I restart my phone, it always asks me to type my pin and "decrypt" the phone. I'm not sure why it does this (previous cell phone didn't), but apparently (this is only a theory) it uses this keyboard application, so I can't actually type my PIN in to decrypt my phone.
I could be completely wrong, and I might have accidentally deleted some other important file from my phone, but either way, I don't know how to fix my phone right now.
I did a bit of research and found out I was supposed to flash a ROM onto my device. However, I don't think I can even connect my device to my computer because normally I would have to enable USB debugging and file transfers.
Update: I booted up my phone in recovery mode (TWRP) and it was able to connect to my PC.