Can't open IIS manager

Solution 1:

I wonder if it's on a "2nd monitor", what happens if you right click on the taskbar icon, and select move, and then move it to your main monitor? Does that bring it back?

Solution 2:

I found a new solution. First, when we get this error IIS Manager couldn't appear. Go to IIS Manager and right click to go Properties. On the shortcut section you can see Run line. Change this value to Maximized and click Apply or OK. Open IIS Manager again.

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Solution 3:

After just experiencing this problem myself the solution I found in the end was to open task-manager shut down explorer.exe in the Processes tab, maximize IIS in the Applications tab and then run explorer.exe as a new task.

I am aware of the age of this thread however I just had this happen to me on a machine running Server 2008 R2 and this post was the only related article I could find so I'm hoping my contribution will help a future user in need.