Explorer.exe disappeared

Hi,

We are facing issue in windows 7, eset smart security software installed, a notification appeared as below and pic attached.

hxxp://newscommer.com/41qilngy38303743/app.exe;

Blocked by internal blacklist;

C:\Windows\explorer.exe; domain\username;212.47.229.211;

After the notification, the explorer.exe disappeared and all desktop items are also disappeared. then have to go to task manager and again run the command for explorer exe or logoff the system, It continues after every 5 to 10 minutes.

Suggest any solution, Thanks in advance