This update is for the Microsoft .NET Framework to disable RC4 in Transport Layer Security (TLS) through the modification of the system registry. Use of RC4 in TLS could allow an attacker to perform man-in-the-middle attacks and recover plaintext from encrypted sessions.
Microsoft has released a security advisory about this issue for IT professionals. The security advisory contains additional security-related information. To view the security advisory, go to the following Microsoft website:
More information about this security update
Restart informationThis update does not require a system restart after you apply it unless the files that are being updated are locked or being used.
Update removal informationNote We do not recommend that you remove any security update.
To remove this update, use the Programs and Features item in Control Panel.