To prevent this from happening just follow these easy steps:
In the Start Screen type Default Programs and select it.
Click the Set your default programs link.
From the left list of programs look for: Windows Media Player and Windows Photo Viewer, and from the options on the right, choose Set this program as default or Choose defaults for this program, with this last option you can select for which specific files the application will be the default.
Then just click OK to finish. Here is also a previous How-To that shows you how to open pinned sites from the Start Screen in Internet Explorer 10 instead of the IE Metro. Keep in mind that you are not limited to use these default programs, if you prefer using other media player or photo viewer, you can just install them and then set them as defaults with the same process. All content on this site is provided with no warranties, express or implied. Use any information at your own risk. Always backup of your device and files before making any changes. Privacy policy info.