My Windows 10 Version 20H2 will not install the update 0x80004005.

Hello and thank you for trying to help....

setupact log

setuperrlog

The rollback log wasn't created

Add me to the list of people who cannot get 2004 or 20H2 to install without error.  I'm on try number 50-something,   I have a similar post on the community and haven't found anything that resolves the issue either,  

Let us check the Installation log to find why the update failed. Please share the logs as mentioned in this article. You should use a File sharing service like Onedrive or Media Fire to upload files and share the link in the next reply.

https://answers.microsoft.com/en-us/windows/forum/all/troubleshoot-feature-update-install-failures/eaf4ff24-64d6-4c72-824c-3ba3df716fc3

The Panther logs. Files named Setupact.log and Setuperr.log from the following path C:$Windows.~BT\Sources\Panther

The Rollback logs: These usually are created if Windows Update rolls back. Files named Setupact.log and Setuperr.log from the following path C:$Windows.~BT\Sources\Rollback

[Only if the error code is 0xC1900101-0x30018] The Device Install Log from C:/$Windows.~bt\Sources\Rollback\setupapi\setupapi.dev.log

Add me to the list of people who cannot get 2004 or 20H2 to install without error.  I'm on try number 50-something,   I have a similar post on the community and haven't found anything that resolves the issue either,

I agree. It was safer to stay in 1909. I had this problem as well. I updated my gaming laptop to 20H2, after two days, I can't turn on my laptop anymore. I went to a technician, and I was told that my HDD got corrupted. They had reformatted, and I even bought an SSD and upgraded my RAM to 16GB. Now it's working fine and fast. But suddenly, this 20H2 version pops up again. I tried to download and install it again, but there's still an error. So better not bother with it.

i need to get this update things in the microsoft store are not working and im starting to think everything else is going to start to do the same. 

Just found this thread and comments.  In a way I am happy I am not only person getting this problem.  And I have tried most of the solutions above that I understand.  So I have no idea where to go from here.  All previous updates worked very well and I am getting very annoyed with Microsoft as dealing with this issue and the repeated lengthy failures to install are wasting an awful lot of my time.