Updated December 2024: Stop getting error messages and slow down your system with our optimization tool. Get it now at this link
- Download and install the repair tool here.
- Let it scan your computer.
- The tool will then repair your computer.
Error 0x800f0826 usually prevents the installation of Windows 7 Service Pack (SP) 1. The system usually downloads and installs Service Pack SP1, but returns to the previous version of Windows because of this error. The error is displayed, whether you are installing Service Pack SP1 from Windows Updates or from the standalone installation program.
There are several ways to solve this problem.
Restore deleted drivers
Since the problem is mainly caused by the driver cleaning tool you have used in the past, using the same tool to restore these drivers solves the problem. Generally, these driver cleaning tools have a backup copy that you can use to restore your drivers.
December 2024 Update:
You can now prevent PC problems by using this tool, such as protecting you against file loss and malware. Additionally, it is a great way to optimize your computer for maximum performance. The program fixes common errors that might occur on Windows systems with ease - no need for hours of troubleshooting when you have the perfect solution at your fingertips:
- Step 1 : Download PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
- Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
- Step 3 : Click “Repair All” to fix all issues.
Go to the official page of the driver cleaning tool you are using and look for the information you need to recover the deleted drivers. You can use their website, browse their forums or contact them to obtain this information.
Once you have restored the drivers, try reinstalling the Service Pack and the problem should be fixed.
If, for any reason, you cannot recover the deleted drivers, you can still download the new copy of these drivers from your official website.
Clean Install windows
Your best choice for machines that have failed is to reinstall Windows 7, then install SP1 before any other installation. Once the Windows 7/2008 R2 SP1 installer fails, it tends to damage various parts of the system. When installing SP1, also make sure that all other installations are complete and that no other updates are performed at the same time.
Quick Fixes:
1. Terminate the Internet connection.
2. Disabled the antivirus and firewall features and everything else I could find – basically the whole McAfee suite.
3. That was the problem: In Services (as administrator), I right-clicked on “Windows Modules Installer” and on Properties. On the Restoration tab, the original settings were First failure – Restart service, Second failure – Restart service, Subsequent failures: No action taken. What I did was change the Subsequent Errors parameter to restart the service. This was entirely a guess on my part, but I thought that if the problem was that WMI did not remain automatic, then the service could stop during installation. I was hoping that this would force a restart. Well, I may blow smoke on this case, but it worked.
I hope it will work for you. Let us know in the comments below.
Expert Tip: This repair tool scans the repositories and replaces corrupt or missing files if none of these methods have worked. It works well in most cases where the problem is due to system corruption. This tool will also optimize your system to maximize performance. It can be downloaded by Clicking Here
