Visual Studio 2013 is hanging

Recently I faced a weird issue with hanging Visual Studio. It hung forever in 5 seconds just after starting devenv.exe. I tried to repair, uninstall and install it but it didn't help.
I attached then to hanging process with WinDbg. I found that GUI thread was stuck in licensing operation.
I removed HKEY_CLASSES_ROOT\Licenses\E79B3F9C-6543-4897-BBA5-5BFB0A02BB5C key from registry and reinstalled Visual Studio again. Everything worked fine then.

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