Image Resizer Tool: How To Compress The The Size Of Images?

A friend asked me to send him a copy of a photo I had taken which I did he the complained that it was too big and that I should resize it how I asked so he told me, go to my pictures right click on an image select mail recipient and a panel will appear offering to resize the image for emailing. This is where the fun begins not for me I said so I investigate a bit and find this powertoys programe download it ( I have reinstalled this prog more times this week than you've had hot dinners) I have tried any number of so called fixes that I have found on other forums it just don't work, in fact the image resizor option your supposed to have when you right click on an image which should create a resized clone in the same folder dosn't work either to add insult to injury my friend wondered why I had to right click on the image anyway as for him all he has to do is hover the mouse icon over the image and the panel appears. Ideas needed.