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When I try to install Windows XP (don't ask...) on a new-ish laptop (Lenovo Y410p), its text-mode portion installs correctly, but then when I try to boot it afterwards so that it can continue with the graphical portion, it gives me the STOP error 0x000000A5, telling me that the system is not ACPI-compliant.
This seems strange, because in the firmware settings, the option to switch between Discrete and UMA-only graphics explicitly says I need to select UMA for Windows XP, which I am doing, and which makes me think it is indeed possible to install Windows XP on this machine. But I can't figure out how.
Is there any way to either fix or bypass the ACPI check?
1There's little reason to install Windows XP directly. Doing so would mean you can't morally connect to the Internet, due to unpatched vulnerabilities. If you have to test e.g. Windows XP browsers, there are services for that. If you need something more complete, you could run Windows XP in a virtual machine. – ChrisInEdmonton – 2015-08-03T21:38:47.173
@ChrisInEdmontom: For the purposes of this question assume I have a valid reason. – user541686 – 2015-08-03T21:42:13.293
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According to http://shop.lenovo.com/ca/en/laptops/lenovo/y-series/y410p/#tab-tech_specs the laptop does not even support Windows 7, let alone Windows XP. It's unlikely you'll be able to make it work. However, it is NOT impossible and so I'm holding out hope I'm mistaken, and certainly not voting to close.
– ChrisInEdmonton – 2015-08-03T21:46:30.033@Mehrdad no, you don't. If you actually need xp for some bizarre reason, install windows 8 after enabling virtualization in the bios and put xp in a hyperv vm, preferably without a network connection. – Andy – 2015-08-03T23:04:08.733