Hello! If you are reading this, you have probably committed an atrocity! Assuming that you are using Windows XP, it is a (mostly) stable operating system that is still used past its "expiration date." However, like many of the other stock programs that Microsoft ships with their OS, Windows Paint is not always the best choice when editing images to be posted on the internet. Much of the original quality of images can be lost when exporting directly from Windows Paint. It can still be avoided, however, by exporting/saving your image as a .PNG, and NOT a JPEG. This rule may not apply to Windows Vista or 7 as far as I know. Also not sure about Macs or Unix OSes.