Microsoft's October 2015 Windows Update set contains a fix for my jailbreak exploit:Specifically, the "Trusted Boot Security Feature Bypass Vulnerability – CVE-2015-2552" is my jailbreak exploit =( This is sooner than I would like, since it may hurt Windows Mobile 10 jailbreaking. I've decided to release the exploit details. Note that it's not very user-friendly at all right now.The exploit itself is simple. Run an administrator PowerShell (can't be cmd), and execute the following command, then reboot:bcdedit /set '{current}' loadoptions '/TŅSTSIGNING'(The Ņ character is Unicode character U+0145, which you can find in Character Map if you need it.)Your system will come up in "test signing" mode, along with a watermark on the desktop indicating this. While in test-signing mode, applications still have to be signed, but they can be signed by anyone, including your own self-signed certificates.How to sign executables for this is mostly beyond the scope of what I'm posting. Use makecert and signtool. Your certificate must be at least 2048-bit RSA. When using signtool, be sure to timestamp your executable (/t option), use page hashing mode (/ph) and SHA-256 (/fd SHA256).Someone I've been working with made a full jailbreak based upon this that doesn't require signing anything, like the RT 8.0 jailbreak was able to do. Stay tuned.Details of why this works: http://pastebin.com/w5U2qTR0