Download Windows 10 21H2/21H1/20H2/2004/1909/1903 ISO and Fix Fail to Install Error

Microsoft has released 12 builds of Windows 10 cumulative updates -  21H2/21H1/20H2/2004/1909/1903/1809/1803/1709/1703/1607/1501. These updates are now available for all Windows users to free download and install on their PC now. If you are looking for access to download the latest update of Windows 10, here below you'll find direct download links for new Windows 10 cumulative updates.

If you fail to install new updates of KB5015020/KB5008212/KB5013945/KB4592449 in your PC, relax and we have found effective methods for you to fix this issue without losing any data. 

Backup system and data before downloading new Windows 10 updates

In order to avoid data loss issue or any system error while installing Windows 10 21H2/21H1/20H2/2004/1909/1903 on your PC, it's highly necessary to create a system image and data backups in advance. 

Professional Windows backup recovery software - EaseUS Todo Backup is a highly recommended system backup software for you to free backup Windows 10 with simple clicks. 

1. Free download and install EaseUS Todo Backup in PC. Connect an external storage device to the computer.
2. Launch EaseUS Todo Backup and click "File Backup" "Disk/partition  Backup" or "System Backup".

3. Choose data and specify the external hard drive as the backup destination, click Proceed to start backup data.

After backing up the Windows system and important personal data, you can now directly download and install Windows 10 with KB5015020/KB5008212/KB5013945/KB4592449 on your PC now. No data loss error will occur.

Fix Windows 10 21H2/21H1/20H2/2004/1909/1903 failed to install error

If you are having Windows 10 update stuck error with latest OS builds or you failed to install Windows 10 1809/1803/1709/1703/1607/1507, just relax and you may follow below-offered methods to fix these problems with ease. 

Method 1. Troubleshoot Windows 10 failed to install error

You can follow the below steps to directly run Troubleshoot to fix Windows update KB5015020/KB5008212/KB5013945/KB4592449 fail to install error:

• Type: troubleshooting in the search > Go to System and Security > Tap Fix problems with Windows Update.
• Tick Advanced > Enable and check Apply repairs automatically.
• Tap: Run as administrator (you may have to enter your passcode first) > Then click Next to finish the process.

Method 2. Reset Windows Components if Windows 10 21H2/21H1/20H2/2004/1909/1903 update failed

1. Press Windows + X and choose Command Prompt (Admin).
2. Stop BITS, Cryptographic, MSI Installer, and the Windows Update Services. 
Then type the below commands at the Command Prompt and hit Enter after you type each command:
                         net stop wuauserv 
                         net stop cryptSvc
                         net stop bits
                         net stop msiserver
3. Rename the SoftwareDistribution and Cartoot2 folder. Then type the following command in the Command Prompt and press Enter after each type:
                        net start wuauserv
                        net start cryptSvc
                        net start bits 
                        net start msiserver
4. Type Exit at the Command Prompt and restart PC.
After this, you may retry to install Windows 10 new updates in your PC with new features.

Method 3. Fix file system error and clean install Windows 10 update with KB5015020/KB5008212/KB5013945/KB4592449

File System error check will find and fix all system errors and Windows update problems for you.

• Press Windows + X and click on Command Prompt (Admin).
• Type: cd\ and hit Enter.
• Type: sfc /scannow and hit Enter.
• Wait patiently to let the check file system process complete, then Windows 10 updates fail to install issue will be repaired.

After this, you can then click the below-offered Windows 10 update links to clean and install them on your PC:

• Download Windows 10
• Download Windows 10 KB5015020
• Download Windows 10 KB5008212
• Download Windows 10 KB5013945
• Download Windows 10 KB4592449