Windows 7, Non ACPI Compliant issue.

[RD995]

When i try to open the windows 7 install cd/usb it freezes for 1 second on the windows 7 loading icon then gives me a blue screen with the following code: STOP: 0x000000A5. I've read on posts to turn on legacy support which i already did and it did nothing to it, My HP 255 G7 notebook is running Insyde F.39 bios, Does not have any ACPI option nor OS optimizations option.

[Paul_Tikkanen · Accepted solution]

Hi:

You cannot install or run W7 on a notebook with a Ryzen processor.

That is why you don't see any W7 drivers for your notebook on the support page.

HP 255 G7 Notebook PC Software and Driver Downloads | HP® Customer Support

[RD995]

So there is no solution??

[Paul_Tikkanen]

Unfortunately, there is nothing you can do.

Your Windows operating system options are Windows 10 and Windows 11.

Nothing older is supported/