Hello! I am just a normal person currently upgrading but I do have a solution!
Windows 10 2004 is very unstable right now. Many are recommending you do NOT upgrade now. Many drivers have not been released. There are steps to take before updating and steps after. I (again) do not recommend upgrading now but if you have to here are some
steps to fix your issue. (WARNING: You may not end up with Windows 10 Version 2004 at the end of these steps) (WARNING: Step 1 is quite long but it is recommended that you read it as it contains information about what to buy for external storage, alternatives
and why you may avoid using a USB)
Steps to make before upgrading:
1: Buy a USB or any other external storage (Recommended for things like documents for a company or bills but you may use it for personal use) (You can also use things like network drives and online storage but these are a bit less reliable however Onedrive,
google drive or mediafire are perfect for quick solutions) (You do not have to use USB or external storage)
2: Backup any important Data on cloud (Personal DATA recommended, like family photos) (If you more than 1 USB drive or any other form of external storage you may use USB)
3: Plug in your USB to move things like documents for a company or bills (you may use it for personal use)
RECOMMENDATION: Upgrade your drivers at this point. Open Windows update and upgrade all but the feature update
4: Open Control Panel (NOT Settings)
5: Type Recovery into search or navigate to it. If you know how to use the navigation bar (I can't remember what it is called so this is my guess) copy and paste this: Control Panel\All Control Panel Items\Recovery
6: Click Configure System restore
7: Create a Restore point by clicking Create.
8: Give it a unique description. Then click next/Create
You have made this restore point so we can recover your PC. You now may upgrade.
Lets say you are now having some issues now
Step 9: Repeat steps 4-6
Step 10: Click system restore
Step 11: Choose a different restore point and click next.
Step 12: Keep clicking next after you chose your restore point.
Your computer will come back to how it was before.
I will come back tomorrow with some advice on after the update. Hope this Helps - Sean