Microsoft recently sent a number of updates to fix vulnerabilities related to Meltdown and Specter attacks on chipset devices from Intel, AMD, and ARM. All popular Microsoft operating systems are updated, in addition to Windows XP.
Upgrade to Windows 10 in Windows Update or download the installer from the link below:
For old equipment:
Note: There will be instances of unsuccessful installations due to issues with the antivirus software version. Make sure your antivirus software is compatible with your operating system and new updates. Or you can set it manually as follows:
Computer \ HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ QualityCompat
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If during the update you get Windows Update 0x80070643, go to Settings> System> About and ensure that Windows 10 has been updated to the latest version as this is a problem that prompts the user to fail.