Windows XP won't install the digital camera from Iphone 4?

How to get pictures from my iphone to PC (windows xp) ?

XP is almost ancient by today's standards.

Make sure you have installed the latest updates and service packs on your computer.

Don't know, it may not. You could either need a mac or windows 7 or 8. Check with apple.

You seem to understand that you need to update your iPhone from time to time, but this applies to computers as well.

Since XP, there has been Windows Vista, Windows 7 and now Windows 8

Your XP computer is similar to still using the original iPhone.

Time to update

Email them to yourself using your iphone and just download them from the computer.