Forum Discussion
Why My PC can't be upgraded to Windows 11 25H2
As of December 25, 2025, Windows 11, version 25H2 (also known as the "Windows 11 2025 Update") is widely available.
Since you are upgrading from 23H2, this is a major "full" upgrade rather than a small patch. The transition involves moving to the new core platform introduced in late 2024, so the installation will take longer (typically 30–60 minutes) than a standard monthly security update.
If Windows Update isn't showing the option, you can force the upgrade using Microsoft's official tool. This is safe and keeps your files intact.
How to upgrade to Windows 11 25H2 from 23H2 on supported PC:
- Visit the official Microsoft Download Windows 11 page.
- Under "Windows 11 Installation Assistant", click Download Now.
- Run the downloaded file (Windows11InstallationAssistant.exe).
- Click Accept and Install.
- The tool will download the 25H2 files and prepare the installation. Your PC will restart automatically to finish the process.
Troubleshooting Common 23H2 to 25H2 Upgrade Issues
Hardware Compatibility: Microsoft slightly tightened CPU/TPM requirements between 23H2 and 24H2/25H2. If you previously bypassed requirements to install Windows 11, the standard updates (Methods 1 & 2) will fail. You will need to use a tool like Rufus to create a bootable USB from the ISO (Method 3) with requirement checks removed.
Disk Space: Because you are jumping two versions (23H2 -> 25H2), ensure you have at least 25-30 GB of free space on your C: drive.
SSDs: Some older SSDs had compatibility blocks with the 24H2/25H2 platform. Ensure your SSD firmware is up to date if the update fails repeatedly.