Hello again, Gary.
It's okay about the delay. I can't thank you enough for staying this far with my problem.
This is from RestoreHealth:
Deployment Image Servicing and Management tool
Version: 10.0.19041.844
Image Version: 10.0.19043.1645
[===========================84.9%================= ]
[===========================86.7%================== ]
[===========================88.7%=================== ]
[===========================90.5%==================== ]
[==========================100.0%==========================] The restore operation completed successfully.
The operation completed successfully.
But, when I tried the updates again, another one of the cumulative updates failed.
Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 21H1 x64 (KB5013624) - Download error 0x80070002
The other one (KB5013942) is being installed. I'll wait and see if it'll work this time. I'll get back after restarting the computer.