Hello there! I am Charity, I'm an Independent Advisor and a Microsoft user like you.
I'm glad to help you today!
I understand you need help with your Windows update. I would suggest you Clear Software Distribution and Catroot2 Folder. Kindly follow the steps below.
Step 1. Press Win + R to open the Run box.
Step 2. Type services.msc and hit OK.
Step 3. Find the following services and right-click on them one by one to select Stop.
Windows Update
Background Intelligent Transfer Service
Cryptographic Services
Step 4. Open File Explorer > navigate to the following locations > delete all the contents inside it:
C:\Windows\SoftwareDistribution
C:\Windows\System32\Catroot2
Step 5. After all the contents in the SoftwareDistribution and Catroot2 folders are deleted, reboot your computer to see if Windows update 0x800f0825 persists.
Hope it works!