GeneralFungi said:
Technically yes but the process you'd need to go through involves tampering with the system in some unintended ways. It's difficult and grueling. Microsoft threw up as many obstacles as they could in order to make it as difficult as possible to downgrade unless you have the Pro version of windows 8 which is obviously more expensive. It involves tampering with the operating system in ways that microsoft didn't intend. They mostly hope that it will either be too expensive or be such a pain in the ass that people will decide not to go through the trouble and just stick with windows 8.
No it doesn't. You are speaking about something of which you apparently have little understanding.
With Windows 8 and the introduction of UEFI (Unified Extensible Firmware Interface, essentially meant to replace the BIOS), Microsoft has introduced OS signing by a feature called "Secure Boot", meaning that Operating Systems needs to be signed to be able to run on a computer. This is an effort to disburb malware and rootkits that tamper with core OS functionality. It also means that on computers sold with Windows 8, it is impossible to run any other OS unless you either disable Secure Boot, gets it signed by Microsoft og replace the keys that verifies the OS.
So far so good, but here is where you went wrong:
1) It's not 'unintended' tampering. It's perfectly outlined in the specifications.
2) It's not difficult. The options are in EUFI (BIOS) and are easily accessible and are easily disabled.
3) The options can be used to benefit other OS's than Microsofts by replacing the keys. If you want to run a secure Linux distro, you can sign the distro with your own keys and insert them into UEFI, and it will verify your own OS.
4) The entire process of disabling Secure Boot can be done in less than a minute.
As for the thought that Microsoft just wants to make it hard to downgrade from Windows 8, I'd call that accusation short-sighted. Malware is an increasing and real threat, and this system (UEFI) is intended to be used for many years to come (several decades perhaps). I consider this forward thinking, and an important step for handling malware in the coming IT generations.
Waaghpowa said:
Long answer: Yes, assuming you plan to completely detach yourself from Microsoft and windows entirely. Windows 8 and it's secure boot make dual booting quite a difficult task compared to the previous method involving Windows 7. Unless you built the PC yourself from scratch and it doesn't have secure boot, you would have to resort to some pretty technical modifications to the boot, or choose Windows 8 from the boot menu.
Secure Boot isn't a "Windows 8" feature. It's a UEFI-feature, and therefore designed and implemented in the motherboard, regardless of the system you have installed.
I won't get into the Linux-distro issue, because i have little experience with dual-booting Linux and Windows (used to run Linux stand-alone on an old server of mine, but that was years ago), but if Secure Boot is disabled, the problem is entirely 100% related to Windows 8 and the Windows MBR then. Secure Boot is a hardware feature of UEFI, not a software feature of Windows 8.
This also means that in the future, all motherboards sold for PC's you build yourself - even from scratch - are gonna come with Secure Boot. However, it's likely to be disabled by default (compared to laptops and likely a lot of pre-built desktops), where it's gonna be enabled by default).