When I open any file, it opens Windows Media Player. I don’t know what happened. My mother just clicked something on home group. Please help!
Sounds like Windows Media Player was set as the default for all file types.
This question has been asked (and answered) before, so I won't be redundant. Have a look here:
Here Tina explains how to fix your exact issue:
Let me know if you need any more help!
you have file association problem
download the archive on another (or you can try it on your pc), extract it transfer the reg file on usb key, plug the usb to your pc, transfer the rig file on your desktopn, click on it then reboot pc.
you can also extract the file online