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RegEdit / Missing System.Web.Extensions v4, or .Net 4.5 not installed completely?

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Hi,

I have a new machine to host a small intranet on, Server 2008 R2 w/ IIS 7. I've downloaded the .net 4.5 exe and ran it  If I go to regedit, and go to HKEY_LOCAL_MACHINE>SOFTWARE>Wow6432Node>Microsoft>.NETFramework and see v4.5.50709.

When I try to load an aspx test page, I get "Parser Error Message: Unrecognized attribute 'targetFramework'. My understanding is that targetFramework is a .net 4.5 only attribute. So, I wonder if I have .net 4.5 completely installed.

If I take out the 'targetFramework = 4.5' from the two config.web files, I get an error stating:

Could not load file or assembly 'System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.


Any suggestions?


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