Product:Windows Operating System
Event ID:7
Symbolic Name:IO_ERR_BAD_BLOCK
Message:The device, %1, has a bad block.

The device has a bad block of memory, which Windows attempted to read. The data might be missing or corrupted.

User Action

If this event is logged regularly, replace the hard disk drive.

Currently there are no Microsoft Knowledge Base articles available for this specific error or event message. For information about other support options you can use to find answers online, see