A bad pool header error on a computer indicates that the pool header is corrupt and can be triggered by using antivirus programs that are not fully compatible with Windows 8 or when booting Windows 8 on an Intel Macintosh. The number after the warning gives more specific error information.
This error can be resolved, and users should begin by booting the computer in safe mode. Users can then uninstall their current antivirus program and replace it with Microsoft Security Essentials, which is preloaded onto most Windows 7 and Windows 8 operating systems. Mac users should dual-boot the computer in Windows 7 instead of 8, and all users should update their drivers.