content: But nobody knows for sure. With TPM and EFI, it's entirely feasible that Microsoft, who holds the signing keys for a vast, vast majority of the consumer-grade equipment out there, could decide to "obsolete" anything it chooses. We've been sounding a warning about this for years, but nobody has wanted to hear it.  Now it seems they're flexing a bit... testing the water. Next, they'll start locking stuff down. You don't have to believe it. It won't make a bit of difference.