I was able to install
Windows 11 on an older
HP ProBook 455 G5 (3QL87ES) with an
AMD A10-9620P CPU with Radeon R5 graphics. Only
the graphics driver required some fine-tuning. Status as of July 2025, running Windows 11 version 24H2.
Installation from a running Windows 10 system works while retaining apps and personal data. If you're starting from Windows 8, you'll first need to upgrade to Windows 10—although workarounds may exist. Anyway, backing up important data is always a good idea.
Before starting the upgrade, it may be advisable to deactivate antivirus software such as Microsoft Defender and disable drive encryption (or at least save your BitLocker recovery key). BitLocker has caused issues in the past. Under “Settings > Windows Security,” it’s worth disabling the options in “Device Security”. In “Device Security > Security Chip,” you’ll find information about the security chip, which could be a firmware TPM (fTPM) as well.
Updating to Windows 11:
Simply download the official Windows 11 24H2 ISO from Microsoft in the correct language version, mount the ISO file virtually (double-click), and run the setup located under `/sources` on the mounted DRIVE (should work for both Home and Pro editions):
Powershell:
cd DRIVE:
cd sources
setupprep /product server
Make sure the latest firmware is present and enable the appropriate BIOS settings (Secure Boot, TPM, virtualization). On some devices, Windows only balks at the CPU or the integrated graphics chip, as was the case with mine. Initially, Windows used a basic display driver in compatibility mode, full CPU usage at 100% brightness.
I used the
Radeon Crimson driver 16.7.3 for Windows 10 64-bit. The EXE file can’t be run directly: you need to extract it using 7-Zip, PeaZip, WinRAR, etc. Then manually install the driver via Device Manager (update driver for the GPU entry). The control center must also be installed manually afterwards from the extracted folder: \Packages\Drivers\Display\WT6A_INF\B304863\
ccc2_install.exe
blogs.windows.com
support.microsoft.com
www.elevenforum.com
