I am not a fixer but I still want to fix everything around me. Although I know that the first amelioration I should make is to myself.
How to Re-size Photos at One Time
I made this post as my friend request. However, I hope this post will be useful for you too.
1. First of all, make sure you put all the photos you want to re-size in one folder. In this case, I took “Sample Pictures” folder as example. Then right click on one picture, any picture. Select “Open With>Microsoft Office Picture Manager”

2.Then you click the button the will make the view as thumbnail. It’s located about at the top left.

3. Then you click “Edit > Select All”. Or simply just press “Ctrl+A”. Well, I’m a shortcut-freak if you wanna know ;).

4.Then you click “Edit Pictures”

5.Then there is a side bar will appear. Choose “Resize”

6. My favorite size is by clicking “Predefined width x height” then choose “Document - Large”. It won’t make you picture too small, but the file size will be around 1Mb.

7. Then click “OK”

8.Then all of the pictures will be stared before the file name. Then click save.

Well, hopefully it’s helpful.