Please post back and tell us what part of the world you are from and what type/brand of windows you installed.
This will give us a better undestanding of what can and can not be done.
By now you may have realized that you needed to post a new question by clicking on the "post a message" tab. However, since we are here anyway, you need to also post back with more information to help us, help you.
Please tell us what you have now, where you are located, and why you think you need new windows?