Disabling the RC4 Cipher suites

To disable the RC4 Cipher suites, follow these steps in the Registry Editor:

  1. To disable RC4 40/128, ensure the following key is absent. If the key is present, ensure it is set to 0. HKLM\System\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 40/128\Enabled.
  2. To disable RC4 56/128, ensure the following key is absent. If the key is present, ensure it is set to 0. HKLM\System\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 56/128\Enabled.
  3. To disable RC4 64/128, ensure the following key is absent. If the key is present, ensure it is set to 0. HKLM\System\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 64/128\Enabled.
  4. To disable RC4 128/128, ensure the following key is set to 0. HKLM\System\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 128/128\Enabled.