Microsoft Download Center Archive

Security Update for Microsoft .NET Framework 3.5 on Windows 8.1 and Windows Server 2012 R2

  • Published:
  • Version: 3.5
  • Category: Security Patch
  • Language: English

A security issue has been identified that could allow an unauthenticated remote attacker to compromise your system and gain control over it.

  • A security issue has been identified that could allow an unauthenticated remote attacker to compromise your system and gain control over it. You can help protect your system by installing this update from Microsoft. After you install this update, you may have to restart your system.
Knowledge Base Articles:
Security Bulletins:

Files

Status: Deleted

This download is no longer available on microsoft.com. The downloads below are archives provided by the Internet Archive Wayback Machine from the Microsoft Download Center prior to August 2020.

FileSize
Windows8.1-KB2979573-x64.msu
SHA1: 4e6b3a60155951f82426aacd24d2076875dde8f7
919 KB
Windows8.1-KB2979573-x86.msu
SHA1: 48e21177a582ca8f94db6819d1dca8a9ffb2aa0b
867 KB

System Requirements

Operating Systems: Windows 8.1, Windows Server 2012 R2

Installation Instructions

    1. Click the Download button on this page to start the download, or select a different language from the Change language drop-down list and click Change.
    2. Do one of the following:
      • To start the installation immediately, click Run.
      • To save the download to your computer for installation at a later time, click Save.
      • To cancel the installation, click Cancel.