Hi Saintbaby,
You should have a program "Paint" installed in your system.
1. Click on Start-> All Programs-> Accessories-> Paint
2. Open the file you would like to resize
3. Press "Ctrl W"
4. Resize your image by reducing the horizontal and vertical stretch equally.
Please feel free to e-mail us if you require any further assistance. Thank you.
Regards,
Chin Leng.