If you have Microsoft Office you also get MS Office Picture Manager. It gets installed by default. If you have it, try it out, a wonder photo editor that is amazingly simply and effective to use. Cropping and resizing is a couple of clicks. You can do the other routine things like auto adjust and change the contrast/brightness and mess with other things too if you want to go there.
The interface is very slick, typical pull down menu and everything is right there.
You can also open a lot of pictures and then resize all of them at once.
If you have it, give it a try.