Hello Vladimir,

Can you please tell me what exactly happens? What error?

You can try to tell to uninstall the .NET Framework 4 and then to use this cleanup tool http://cid-27e6a35d1a492af7.skydrive.live.com/self.aspx/Blog_Tools/dotnetfx_cleanup_tool.zip and once the tool has finisherd to reinstall the Framework .NET 4 from this link again: http://www.microsoft.com/en-us/download/details.aspx?id=17718

Many thanks!