Hello, 

I have a 2020 Dell G5 SE 5505 service with service tag <To protect you, your private information was removed from public view. All private data was saved to your private Case. DELL-Admin>

It tries to install the following Windows update for Windows 11:  

2026-01 Security Update (KB5074109) (26200.7623)

It installs, and tries to reboot to finish installation, but when it gets to 97% complete, it uninstalls and gives an error saying it couldn't be installed.  My computer has not been able to install this update for months.  I think there are other updates that won't install either, but this is the one that came up tonight. 

Suggestions?  

I'm running bios 1.24 from 9/5/2025. 

Any help is appreciated.