0x800700c1: How to fix this Windows Update error code

Microsoft releases new Windows updates and patches to help fix bugs and improve performance. However, our readers reported error 0x800700c1 during update installation. Therefore, this article will discuss how to fix the error on Windows 11.

Also, you might be interested in our guide on Windows Update error 0x8007045b and some of its fixes.

What causes Windows update error 0x800700c1?

Some noteworthy factors that may cause window update error 0x800700c1 on your PC are:

• Faulty Windows Update Component – The installation process requires certain service to run on your PC. If these services are not running properly, it may cause problems with the installation process.
• Windows UpdateTemporary Cache Folder – Old updates and patches installed on your computer are stored in Windows Update Setup patch files and saved as cache files in the folder. They can become corrupted over time and therefore may cause interference with the Windows Update service.
• Corrupted System Files – When your system files are corrupted, they prevent the Windows Update installation process from using them when needed and lead to Windows Update error 0x800700c1.

Regardless of the cause, you can follow the steps below to resolve the error.

How to fix Windows Update error code 0x800700c1?

Before attempting any advanced troubleshooting steps, please perform the following preliminary checks:

• Close background applications running on your computer.
• Temporarily disable anti-virus software.
• Restart Windows in safe mode and check if error 0x800700c1 still exists.

If the error cannot be resolved, proceed with the following solutions:

1. Run the Windows Update Troubleshooter

1. Press the key to open "Settings "application. WindowsI
2. Select System, TroubleshootingTroubleshooting, and click Other Troubleshooters.
Go to "
3. Most Frequent", select "Windows Update" and click the "Run" button.
Follow the on-screen instructions to complete and then restart your computer.

The Windows Update Troubleshooter will resolve issues that affect Windows Update installation. You can check out how to run the Windows Update troubleshooter on Windows 11.

2. Reset Windows Update Components

Left-click the "
1. Start" button, type "Command Prompt", and then select " Run as administrator" option.
Click "Yes" on the "
2. User Account Control" prompt.
Copy and paste the following commands and press after each command:
3. Enternet stop wuauserv<strong></strong> net stop cryptSvc<strong></strong> net stop bits<strong></strong> net stop msiserver<strong></strong>
Copy and paste in sequence The following command:
4. ren C:\Windows\SoftwareDistribution SoftwareDistribution.old<strong></strong> ren C:\Windows\System32\catroot2 Catroot2.old<strong></strong>
Type the following commands and press Enter after each command:
5. net start wuauserv<strong></strong> net start cryptSvc<strong></strong> net start bits<strong></strong> net start msiserver<strong></strong>
Close the command prompt and restart the PC.

Resetting Windows Update components will fix the issue causing the 0x800700c1 update error. If you're having trouble running Command Prompt as administrator on Windows 11, read our article.

3. Disable Windows Firewall

1. Left-click the "Start" button, type "Control Panel", and then press . Enter
2. Select the Windows Defender Firewall option.
3. Click the "Turn Windows Defender Firewall on or off" option in the left pane.
4. Navigate to Private Network Settings and Public Network Settings, and click the radio button for the Turn off Windows Defender Firewall (not recommended) option.
5. Restart your computer to see if Windows updates can be installed.

Expert Tip:

Certain PC problems are difficult to solve, especially when Windows’ system files and repositories are missing or corrupted.
Be sure to use a specialized tool, such as Fortect, which will scan for corrupted files and replace them with new versions from their repository.

Disabling Windows Defender Firewall will resolve any interference it causes during Windows installation. Read our article on how to disable Windows Defender Firewall on Windows 11.

4. Perform an SFC scan

1. Left-click the "Start" button, type "Command Prompt", and then click " to Run as administrator".
2. Click "Yes" on the "User Account Control" prompt.
3. Type the following and press: Enter<strong>sfc /scannow</strong>
## Restart your PC and check for errors still exists.

SFC scan will find and repair damaged or missing system files on your PC that can cause update errors. You can read about how to fix SFC scan not working on Windows devices.

There is also an effective solution that can help you fix PC errors and resolve Windows update issues automatically.

Fortect is a system repair tool that troubleshoots Windows devices and fixes registry or file errors in just one click.

5. Clear Windows update cache

Press to open
1. File Explorer. WindowsI
Go to Local Disk (C) and right-click, then click Properties from the
2. drop-down list.
Select "Disk Cleanup" and click the "
3. Clean System Files" button.
Check the
4. boxes for Windows Upgrade Log Files and Temporary Windows Installation Files, and click OK.
Exit File Explorer and restart your PC to check if the error persists.

Deleting Windows Update cache files will clear corrupt update files that are affecting the update process and allow the system to write new files.

Read our article to learn what to do if File Explorer keeps crashing your PC.

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