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

There are some known incompatibilities in generic types using the BinaryFormatter or NetDataContractSerializer serialized and deserialized across a mixed .NET Framework 3.5 SP1 and .NET Framework 4 environment. Installing this update addresses these issues.

• There are some known incompatibilities in generic types using the BinaryFormatter or NetDataContractSerializer serialized and deserialized across a mixed .NET Framework 3.5 SP1 and .NET Framework 4 environment. Installing this update addresses these issues.

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	SHA1 Hash	Size
NDP20SP2-KB976569-IA64.exe	b20d6a28ee7f36dbf23f78c81335e79dc49853e3	29.42 MB
NDP20SP2-KB976569-x64.exe	cb34142a840b4178084c3c553b750f46ba446d39	23.89 MB
NDP20SP2-KB976569-x86.exe	dd5f498a00cff2addd29b7f9e5ea8b1054ac2d73	10.91 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.