While monitoring CPU activity in Performance Monitor or Task Manager, you notice an application is consuming 100% of the CPU.

Performance seems normal and other activites get CPU time when they request it.

This is normal behavior for Windows NT 4.0.

Windows NT 4.0 allows an application to consume 100% of the CPU, if no other thread is waiting for CPU time.

When another thread requests CPU time, regardless of its' priority, Windows NT 4.0 yields control.