“Today, when I powered on the relevant PC, it went through BIOS and XP logo screens OK, but never reached the high-res background colour stage of the boot process; instead it auto-rebooted—and repeated this loop endlessly. Booting in Safe Mode made no difference,” one user reported. Via link
Microsoft offers a recent patch to its legacy XP customers, unfortunately it appears to “kill” off some of the machines as some users are stuck in endless reboot.
This is quite an innovative way to “encouraged” legacy users to upgrade. :p