Q: Downloading photos from iPhone to PC?

Do you mean syncing photo's or importing?

Importing: 

http://support.apple.com/kb/HT4083

Syncing Photo's:

http://support.apple.com/kb/HT4236

Are you using "autoplay"? Is it enabled? How is it not working? Does it fail to complete, do you get a error message? have you tried Start> computer> right click on the iPhone than Import from there? It would be easier to give further instruction if we knew exactly what is "failing"

http://support.apple.com/kb/TS1500

This will instruct you of where you need to go to enable auto-play. And windows should recognize your iphone if it is showing up in iTunes because iTunes wouldn't open unless the computer did! Either way, that is how you can enable auto-play and you will be able to import via auto-play.

You can stream the photos to the PC, or even easier, use a program that sees the iPhone as an external disk(programs like the Windows Explorer): there are several: Diskaid, iExplorer, and so on.

yup

Hello. Use iTunes to transfer your data, you should take care of your data.

If you want to transfer your iPhone photos to itunes, you should prevent all your iPhone data will be sync.

Because if you use itunes to transfer data to transfer data to your iPhone which is not synced with this itunes library, all the data on this iPhone will be erased.

<Link Edited By Host> 

using this free software
http://i-funbox.com/

You can transfer Pix and Music from Iphone to PC with ease.

connect iphone to pc (windows) and go to my computer. now youll find your phone as a mass storage device. all of your photos will be there.

I can't copy photos from my iPhone 4 (6.1.3 ios) to my Window 7 PC because I get a message saying: "The requested resource is in use."

So how can I copy my photos to my PC? I need to delete some from my iPhone because I'm running low on space.

Try it again after exitting the itunes program.

Sorry for late response.

Well I remember seeing a youtube video saying that it’s because itunes blocked some data when you sync your apple products, so you may try to change some settings to make them unhidden. Unfortunately I don’t have that video right now. but you can google your question “how to transfer photos from iphone to pc” to find that video. Oh and remember to choose "video" tab on the left side to screen the search results, it will help a lot to find the more exact answers. 

You can try to use some tools to help you if you want to download/move photos from iPhone to computer, sometimes iTunes is not so easy to use, so many of my friends choose to use iPubsoft iPad iPhone iPod to Computer Transfer, although it will cost a little!