I just ordered my first new PC is a while, which will come with Windows 8. I will wait until deciding weather to Downgrade to Win 7. However, I think I should immediately disable the Secure Boot feature, simply from the risk of bricking the PC.
Secure boot is supposed to protect the system, but the way I see it, is that if something goes wrong and some hardware or the hard drive fails, it will leave the system in a completely useless state. Even if I make recovery disks, since secure boot blocks use of burned media, it will most likely fail, and I cannot use a Linux boot disk to troubleshoot.
From everything I have read, secure boot's supposed security benefits are insignificant compared to always present threat of a completely dead PC. From that, I think the first thing I should do it disable secure boot to remove that possibility. Is there any real reason why I shouldn't?
Elliott is right. Even with secure boot enabled the system does not get in the way of getting into BIOS before loading windows so I can always disable secure boot if needed.