A first hand look from the .NET engineering teams
We are happy to announce that the .NET Framework 4.5.1 and its language packs are now available via Windows Update (WU) and WSUS. You can learn more about the release from the What's new in the .NET Framework 4.5.1 topic.
This update is available in the Windows Update applet within the Control Panel. You may need to use the Check for updates feature from within the Windows Update applet to get the release to show up.
The .NET Framework 4.5.1 release is being made available as a Recommended Update, this means that users with Automatic Updates configured to install automatically will get the release automatically. This is the default experience. Users that have modified their AU settings to notify them when updates are available or downloaded will see a notification in their system tray about this update.
We have throttled the distribution of the release via Automatic Updates, which means that a subset of users will be updated each day instead of all users getting the update on the first day. This is done so we can receive and react to customer feedback regarding this update. So if you don’t get the update offered on the first day and do not want to wait until the update is offered you can use the Check for updates feature, which is not throttled, as described above.
WSUS administrators should see this update in their WSUS admin console. The update is also available in the MU catalog for download and deployment.
In some cases enterprises may have client machines that connect directly to the public Windows Update servers rather than to an internal WSUS server. In such cases, an administrator may have a need to prevent the .NET Framework 4.5.1 from being deployed to these client machines, for example in order to allow testing of internal/LOB apps to complete.
Admins can deploy a registry key to machines in order to prevent the .NET Framework 4.5.1 from being offered to those machines. More information about how to use this blocker registry key can be found in the following Microsoft Knowledge Base article:
KB2721187 How to temporarily block the installation of the .NET Framework 4.5.1 and its corresponding language packs.
The .NET Framework 4.5.1 is being offered via Windows Update and WSUS to computers running the following operating systems:
On Windows 8 and Windows RT customers can get the .NET Framework 4.5.1 by upgrading their computer to Windows 8.1 and Windows RT 8.1 respectively. There is no Windows Update offering of the .NET Framework 4.5.1 for these platforms.
Lastly, the following operating systems ship with the .NET Framework 4.5.1 already available in-box, so you do not need to deploy or install the update, you already have the latest bits.
Developers using Visual Studio 2012 can build applications targeting the .NET Framework 4.5.1 by installing the .NET 4.5.1 Developer Pack. The developer pack is a single package containing both the .NET Framework 4.5.1 runtime as well as the .NET Framework 4.5.1 Multi-Targeting Pack which exposes the updated API surface for developers. You can download the .NET Framework 4.5.1 Developer Pack from here:
We have documented known issues that we’re currently aware of in the Knowledge Base Article 2890857 along with possible workarounds and/or mitigations. This list will be updated with other issues as we become aware of these in the future.
Finally, if you have feedback to share about this release you can send an email to: firstname.lastname@example.org.
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Are you sure this will work fine? Am using windows 8 know please let me know because last time when I tried installing newer version it got me bumped reply soon.
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I am seeing issues after installing .net 4.5.1 on my customers SBS 2011 Std Servers. RWA suddenly stops working with end users attempting to click on "Connect" under "computers" and nothing happens. I have to restart IIS and Gateway services 4 or 5 times a day to bring back functionality on RWA. Any idea when a pitch will be issued to fix this problem. The work arounds are totally unacceptable.
I am from .NET Framework team. It will be great if you can share some details (with repro steps, event logs etc.) on this issue by directly sending an email to netfx45compat @ Microsoft .com. We can then maybe get to the bottom of this.
Vivek Mishra - MSFT
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Everytime I update to the .NET 4.5.1 I am no longer able to open Internet Explorer (can not display page). I have to restore my computer to an earlier point. Please help.
I am not sure what is causing this problem, but it seems to date to 12-26 when I installed .NET framework 4.5.1. When browsing sites, I am able to load 5-10 pages, but then consistently get this error message after asking for the next page.
Oops! Internet Explorer could not connect to www.lazyssfarm.com
Access a cached copy of www.lazyssfarm.com/Plants/Perennials/F_files/F.htm
The cached copy does not good. I am using Windows7, IE11. All updates are current. I've looked at my security settings and don't believe this is the problem since the earlier pages loaded. I can load the same web sites on another Windows7 computer in the household.
Dot Net 4.5 update is not getting installed though other updates are getting downloaded & installed. It is creating temp folders in D: drive. OS - Vista SP2
have a look at this link ..www.etechpulse.com/.../microsoft-net-framework.html
I deleted the gac_32 gac_64 and what to do
I deleted the gac_32 gac_64 and what to do for windows 8
I deleted the gac_32 gac_64 and what to do for windows 8
i think the main thing is to not install the wrong file www.gistextra.com/install-net-framework-35-30-20-included-windows-8-81
When is dotNet 4.5.2 going to be available for WSUS for enterprises to deploy it out? thanks