Revert .Net 4.5.1 to .Net 4.0 - WinServer 2008 sp2 Std (32bit) RRS feed

  • Question

  • I have a Windows server 2008 32bit standard running IIS and serving a couple of apps. .Net currently installed are v. 1.1, 3.5 sp1, and 4.5.1

    Due to a compatibility issue with a vendor app, I need to roll back 4.5.1 to v 4.0.  My first attempt using add/remove programs left the server incapable of loading windows normally.  I restored the snapshot and began researching alternative methods.

    Any advice on the most efficient way to revert 4.5 .Net to 4.0?

    Tuesday, May 27, 2014 7:46 PM


  • Hi Drew St. John,

    Look at the MSDN page you will see here:

    Uninstalling the .NET Framework 4.5 also removes pre-existing .NET Framework 4 files. If you want to go back to the .NET Framework 4, you must reinstall it and any updates to it. (See Installing the .NET Framework 4.)

    I haven't saw any other efficient way on this.


    Barry Wang
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    Wednesday, May 28, 2014 2:22 AM