In reply to mike123:
If you want to email, the software normally auto selects thumbnail size (small) photo if you don’t change that. What you need to do is change the size of photo file before sending by clicking on the “image size ‘x’ kb (at the top of your email assuming you use the built in iphone email program) to one of the other size options available, usually small, medium, large, or actual size.
Beware, some email servers will have a size limit on sending/receiving, so you may (most likely will) have to send photos in batches esp if you select actual size and they could be very large file sizes depending on camera/processing, etc.
If you have iCloud already that is the easiest though. Upload, and log in with windows pc and download selected photos.
Edit: As planetmarshell posted, it reminded me that I always used to connect my old iphone by usb to my windows pc and transfer that way. That was very easy and always worked for me.
Post edited at 11:42