Just heard about and checked out this website:
It's a very simple (but slow) website that will resize digital pictures for you online. You browse to the picture on your computer, select what size you want the resized pic to be, then after several seconds your resized picture is displayed. Click the link to Download Now, and you can save the resized picture to your computer. (Rename it with a name you will recognize later.)
The site was started by Admins at some other forum, to solve the continual problems their members were having with picture resizing. It's intentionally very simple for the non-geeks out there. If you have trouble getting your pics resized with other software, you might give this site a try.