Hi everybody,
If you have this error after installation of ls 4.0 :
Server Error in '/' Application.
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The current identity (NT AUTHORITY\SYSTEM) does not have write access to 'C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files'.
Like this picture:
http://imgur.com/VqWRE.jpgJust open "cmd" and execute :
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50215>aspnet_regiis -ga "NT Authority\SYSTEM"