There are multiple useful methods mentioned in this post to fix the error.
Get these methods from theMiniToolwebsite.
And one of the update errors is 0x800703f1 error, which is very frustrating.

The cause of Windows update error 0x800703f1 may be that your system files are corrupted.
The damaged system files entries can cause a lot of trouble for your system.
And there are some other issues with the error code 0x800703f1.

The problem of system restore did not complete successfully may be because of different reason.
This article shows you how to solve Windows 10 restore failed.
So after knowing the cause of 0x800703f1 error, then how to fix the error easily?

Just keep reading, and there are 6 useful methods for you.
Windows Update Troubleshooter is a built-in feature that aims at fixing Windows update errors.
Step 2: ClickUpdate & Securityand then clickTroubleshootin the left panel.
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Step 3: ClickWindows UpdateunderGet up and runningsection in the right panel and then clickRun the troubleshooter.
If the problem hasnt been fixed, then you should try the following methods.
Step 1: Press theWinkey and theXkey at the same time to chooseTask Manager.

Step 2: Go to theProcesstab, and find your third-party antivirus software, right-click it to chooseEnd task.
Step 3: cycle your system and then find out if the error is gone.
Step 1: Navigate toSettings>Apps>Apps & features.
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Step 2: Find the third-party antivirus software and then right-click it to chooseUninstall.
Step 3: Now reboot your machine to see if the error is gone.
Step 1: OpenSettingsand then clickUpdate & Security.

Step 2: Go to theWindows Securitysection and then clickVirus & threat protectionunder theProtection areastab to openWindows Securitywindow.
Step 3: ClickManage settingsunder theVirus & threat protection settingstab.
Step 4: Find theReal-time protectionfeature and then turn it off.

Step 5: Reboot your gear and see whether the error still exists.
Is Windows Defender enough?
If you have doubts about this question, c’mon read this post carefully.

Through the text, you may find the answer.
However, if disabling antivirus software doesnt fix the error, then you better try the following methods.
Method 3: Make Changes to the Drivers
Sometimes, problematic drivers can cause 0x800703f1 error.

Therefore, you might make some changes to the drivers to fix the error.
Here is the tutorial:
Step 1: Press theWinkey and theXkey at the same time to chooseDevice Manager.
Step 2: Find the problematic drivers in the list then and right-click it to chooseProperties.
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Step 3: Go to theDrivertab and then chooseRoll Back Driver.
ClickOKto perform the changes.
Step 4: reset your machine and test whether the error still persists.
Here are the detailed steps:
Step 1: OpenDevice Managerand then right-tap the problematic driver to chooseUpdate driver.
Step 2: ChooseSearch automatically for updated driver software.
Step 4: power cycle your system and then check whether the error is fixed.
Run SFC Tool
The first tool it’s possible for you to use is System File Checker.
As part of your system, you could fix the corrupted system files easily and efficiently.
Step 2: Typesfc /scannowin theCommand Promptwindow and then press theEnterkey.
Step 3: Wait for the process to complete.
Remember that you should never interrupt it.
Step 4: reset your Windows and then look to see if the error still persists.
Here is the way to run DISM to fix the error:
Step 1: OpenCommand Promptas administrator.
Step 2: TypeDISM.exe /Online /Cleanup-image /Restorehealthin theCommand Promptwindow, then press theEnterkey.
This post shows how to fix the DISM error 87.
Therefore, it’s possible for you to restart Windows Update components manually to fix the error.
Now follow the instructions below to restart Windows Update components:
Step 1: OpenCommand Promptas an administrator.
Referring to this, better to use MiniTool ShadowMaker a piece of powerful and professionalbackup and restore software.
This software allows you to back up files and folders, disks and partitions and even the system.
And another important feature of MiniTool ShadowMaker is that you cansync files and foldersto other locations.
Step 2: ChooseConnectinThis Computerto enter the main interface.
Step 3: Go to theBackuppage.
ClickSourceand then chooseFiles and folder.
Step 4: Select all the files and folders that you want to back up and then clickOK.
Step 5: ClickDestinationto select where you want to save the backup image and then clickOK.
Step 7: Wait for MiniTool ShadowMaker to complete backing up files and folders.
In this post, I have found the most efficient method to fix the Windows update error 0x800703f1.
Read this post to learn them and choose a proper one for OS reinstallation.
And you should back up your data regularly in case data loss.
Get detailed instructions from this post 7 Fixes to Windows Update Error 0x80070002[Step-by-Step Guide].