To set the Registry key to Microsoft to check for new updates, you need to go to the following path and create a new DWORD (32-bit) entry, named cadca5fe-87d3-4b96-b7fb-a231484277cc with a value of 0.
ComputerHKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionQualityCompat
Regarding the list of security software that may not be supported and makes Windows 7 not receive updates, Microsoft does not give any specific instructions.
But most software makers update their products to be compatible with the new Windows 10 policy so it is possible with Windows 7 as well. This means that most of the current antivirus software, technically, are compatible with this year's OS.
Windows 7 will continue to receive updates until January 20, 20, and those who are using this OS should install the patches as soon as possible.
Microsoft recommends that Windows 7 users upgrade to Windows 10, especially businesses due to complex processes and multiple steps.
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