My computer won't let me sync my iPod touch 4th generation

My computer isn't/won't let me sync my iPod touch 4th generation. I'm trying to upload photos from my computer (laptop, HP/Windows 7).

iTunes keeps asking me to authorize my computer, it will authorize it, but it will ask the same question and for my Apple information again.

It will let me get to step 3/5 of the syncing process but if I hit the X and close out, it will terminate/end the process. I've only synced this one

computer. Any advice?

-InnocentD3mon