Legacy Update: Get back online, activate, and install updates on your legacy Windows PC

A security issue has been identified that could allow an attacker to compromise your Windows-based system that is running the Microsoft .NET Framework and gain complete control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.

• A security issue has been identified that could allow an attacker to compromise your Windows-based system that is running the Microsoft .NET Framework and gain complete control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.

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.

File	Size
NDP20SP1-KB983582-IA64.exe SHA1: 6b8f450445131180c236ff40f0f310b718206ea5	15.13 MB
NDP20SP1-KB983582-x64.exe SHA1: 86473e691ecf255a4e0035fb7c0542d929932ca9	11.96 MB
NDP20SP1-KB983582-x86.exe SHA1: 3e731cbb9d2fba6e929cee93fc89205954c7d780	5.44 MB

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  Note: More information about Service Pack levels currently supported for the platforms listed above can be found in the following page: Microsoft Product Support Lifecycle.

• 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.