Windows 7 is end of support since January 14, 2020.
After January 14, 2020, if you haven’t buy Windows 7 Extended Security Updates (ESU), the computer will no longer receive security updates.
Have you buy Windows ESU form Volume Licensing Service Center (VLSC) or Cloud Solution Providers (CSPs)?
Once you have bought ESU, follow the guide here to Obtain Extended Security Updates for eligible Windows devices
https://techcommunity.microsoft.com/t5/windows-it-pro-blog/obtaining-extended-security-updates-for-eligible-windows-devices/ba-p/1167091
Then, you could install July 6, 2021—KB5004953 (Monthly Rollup) from here:
https://support.microsoft.com/en-us/topic/july-6-2021-kb5004953-monthly-rollup-out-of-band-b0e3bd48-924b-45c5-8b54-d8317aa62901
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