Can anyone help me with this problem? Blue screen message: Stop 0x000000D1 DRIVER_IRQL_NOT_OR_EQUAL Stop 0x000000D1 (0x00000018, 0x00000002, 0x00000000, 0xB9E4525F) iastor.sys - Address B9E4525F - Base at B9E36000 - Datestamp 42B2DF42. I've looked through drivers in device manager but there doesn't seem to be any conflicts. But i've updated a number of drivers using driveragent (which wasn't easy by the way). I can restart the pc each time and complete several functions b4 another crash...which can happen suddenly for no apparant reason. I,m using windows xp media edition with avast antivirus which tells me all is ok. Any ideas would be much appreciated. raldaman.