Yes it certainly does help. Sorry about replying sooner but I've been out most of the day.
It doesn't seem like it's the cable if the iPad charges when you use that cable. I assume that you are charging using the charge and plugging into a wall socket. It seems to me that you have done your due diligence with iTunes as but I am a Mac user and I'd rather a Windows person guide you through this.
The one thing that you didn't mention is if you tried another USB port on your PC. Sometimes those connections can go bad or cause problems.
You might want to try uninstalling and reinstalling iTunes. There is some really great information about troubleshooting iTunes in Windows that was written by turingtest2, who I consider to be the Windows/iTunes guru in the Apple Support Communities. This guy really knows iTunes and Windows. Maybe something in this user tip will help. He will also know that I have mentioned him, so I will not be shocked if he adds to the discussion.
Troubleshooting issues with iTunes for Windows updates