iPhone 5 not charging via USB from PC I charge my phone using my PC all the time, and it's been only a week that since I bought my iPhone 5. Now I can't charge my phone with my PC.

What could be the problem thats causing my phone to not charge while connected to my PC?

The USB charger is new.
Check the inside of the phone's charger port with a flashlight. Lint can block all the pins from making a connection which will cause the phone not to charge. Same goes for any open connections like the DC "cigarette lighter" port. Try cleaning the hole(s) out I guess is what I'm saying