I haven't had a lot of response in the platform builder newsgroups, so I'll\ntry here.\n\nIn Windows CE 4.1, I had no problem with a NDIS ISR (miniportISR)\ninterrupting the DPC(MiniportHandleInterrupt). In upgrading to Windows CE\n5.0, I'm seeing that the ISR is getting held off by the DPC. I've tried\nserialized/deserialized. I've verified that the interrupt is not disabled in\nthe kernel and can see with independent means that kernel is seeing the\ninterrupt and setting the interrupt event in time with the hardware, but the\nISR waits until the DPC finishes until it is run.\n\nDoes anyone have visibility into what has changed between the CE 4.x and 5.x\nNDIS implementation ? The driver registers as an NDIS 5.0 miniport.