How to fix 0x80071AB1 error when installing Net Framework 3.5?

Question

Issue: How to fix 0x80071AB1 error when installing Net Framework 3.5?

Hello. I need Net Framework 3.5 to run a specific program but every time I try to install it I receive a 0x80071AB1 error. Any tips would be appreciated.

Solved Answer

Windows is one of the most popular operating systems. At the end of 2021, the newest version – Windows 11 was released. However, many people noticed that they cannot run various applications that they used to run on Windows 10, and the issue lies in NET Framework.[1]

NET Framework is used to create and run software applications. When users upgraded to Windows 11 and tried to run specific apps, they noticed that Net Framework 3.5 is missing. It is needed to run some older apps. However, even when people tried installing it, they received a 0x80071AB1 error.

The 0x80071AB1 error could be caused by issues with the Windows Update feature. We recommend trying to update your Windows machine, fixing corrupted files, or resetting Windows update components. In this guide, you will find 5 methods that could help you fix the 0x80071AB1 error when installing Net Framework 3.5.

If you want to avoid a lengthy troubleshooting process, you can also use a maintenance tool like ReimageMac Washing Machine X9 that can fix most system errors, BSODs,[2] corrupted files, and registry[3] issues. Otherwise, make sure to proceed with the steps provided below carefully.

How to fix 0x80071AB1 error when installing Net Framework 3.5?

Method 1. Check for Windows Updates

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  • Click Settings from your start menu and click Update & Security
  • Choose Windows Upgrade from the left panel and click the Check for updates button, and then your computer will check for, download, and install any updates found

Check for Windows Updates

Method 2. Fix Corrupted System Files

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Use Command Prompt commands to repair system file corruption:

  • Open Command Prompt as administrator
  • Use the following command and press Enter:
    sfc /scannow

Fix Corrupted System Files

  • Reboot your system
  • If SFC returned an error, then use the following command lines, pressing Enter after each:
    DISM /Online /Cleanup-Image /CheckHealth
    DISM /Online /Cleanup-Image /ScanHealth
    DISM /Online /Cleanup-Image /RestoreHealth

Method 3. Run Windows Update Troubleshooter

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

If the Windows update was unsuccessful, try running a dedicated troubleshooter:

  • Press the Windows + X keys and go to Settings
  • Go to Update and Security
  • Click Troubleshooter
  • Select Additional troubleshooters
  • Run the Update troubleshooter

Run Windows Update Troubleshooter

  • Restart

Method 4. Reset Windows Update Components

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • Open Command Prompt as administrator again
  • Copy and paste the following commands, pressing Enter after each:
    net stop bits
    net stop wuauserv
    net stop appidsvc
    net stop cryptsvc
    Del “%ALLUSERSPROFILE%\\Application Data\\Microsoft\\Network\\Downloader\\*.*”
    rmdir %systemroot%\\SoftwareDistribution /S /Q
    rmdir %systemroot%\\system32\\catroot2 /S /Q
    regsvr32.exe /s atl.dll
    regsvr32.exe /s urlmon.dll
    regsvr32.exe /s mshtml.dll
    netsh winsock reset
    netsh winsock reset proxy
    net start bits
    net start wuauserv
    net start appidsvc
    net start cryptsvc

Reset Windows Update Components

  • Restart your PC

Method 5. Upgrade Windows 11

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Upgrade to Windows 11

  • Right-click on ISO then click Mount and Setup.exe
  • In the Install Windows 11 dialog, click Next
  • Click on Accept in the license terms dialog
  • Wait for the setup program to check for the available free space
  • On the Ready to install page, make sure Keep personal files and apps have been checked
  • Then click Install and just follow the prompt
  • Windows 11 will restart your device several times, and lead you to the lock screen

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About the author
Ugnius Kiguolis
Ugnius Kiguolis - The problem solver

Ugnius Kiguolis is the founder and editor-in-chief of UGetFix. He is a professional security specialist and malware analyst who has been working in IT industry for over 20 years.

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