What, other than magic, could cause multiple similarly configured XP Pro machines (non-domain joined, windows update disabled, no scheduled tasks) to bugcheck within 15 minutes of each other? The error message recorded in the event log is reproduced below:
Error code 10000050, parameter1 bc6ffff0, parameter2 00000000, parameter3 bf84cd45, parameter4 00000000.
Note: Windows update being disabled is not my choice. These are not under my control and are used in factory automation.
Note: I have considered a power anomaly, but there are many other similarly configured machines that had no apparent issues.