How to Fix All Desktop Icons Changed to Same Icon

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This problem begins when user download an application or file, from an untrusted source. Finish download, user open the file and appear "open with". Then user selects one of the apps from the list, example; VLC Media Player and then press OK. Suddenly, all applications inside the computer turned into VLC Media Player shortcuts. Or when it comes "open with", user selects Windows Media Center, then all applications will change to Windows Media Center shortcut. Desktop icon views may vary depending on what application you choose, when the message "open with" appears. I suggest that you be careful when downloading files from untrusted sources, installing add ons or security extensions on your browser, updating anti-virus and anti-malware to protect you, and dont be fooled by the malicious websites. Thanks. source; https://goo.gl/1vmKGC