Windows 8 has undergone a lot of change when compared to its predecessor Windows 7. One of the most noticeable changes in the OS is the new interface with tiles, a. With the modern interface, users might sometimes feel like they are using two operating systems at once. For instance, you can use applications like Skype from the modern UI which looks completely different when compared to the desktop version. This is the same with a lot of other operations like viewing photos, listening to music, viewing PDF documents, printing, etc.