Okay, so I need to classify this bug report from QEMU into one of the given categories. Let's read through the report carefully. The user mentions that Windows hangs after live migration when using VirtIO devices. They've tested with virtio-scsi and virtio-net, but it doesn't happen with e1000 or without VirtIO. It also doesn't occur with Linux guests. The issue seems consistent across different QEMU versions from 2.2.0 to 2.6.1. Looking at the symptoms: After migration, the Windows graphics stack hangs, but background processes continue. They can log in via SSH and get a command prompt, which suggests that some services are still running. NMI resets bring up the blue screen, then it reboots successfully. The command line shows VirtIO devices like virtio-scsi-pci and virtio-net-pci being used. Now, considering the categories: Mistranslation relates to user-mode assembly, but this is about live migration with VirtIO. Assembly lowering isn't directly relevant here. Other categories include device, network, etc. VirtIO is related to devices, specifically virtual devices in QEMU. Since the issue occurs with VirtIO-scsi and VirtIO-net, it's likely a problem with these devices during live migration. The hang after migration suggests an issue in how the devices are handled post-migration. So, the category should be 'device' because it's about VirtIO devices malfunctioning after migration. device