MCE Bank 4 -- no usb

Hi all,

i have no usb on a machine.
when checking

dmesg | tail -15

this gives me:

MCE: The hardware reports a non fatal, correctable incident occured on CPU 0.
Bank 4: 9432400152080813

when i google this, i’m not seeing a lot of bank 4 's, and the few i find concern Xen, which i’m not running.

does anybody know what Bank 4: 9432400152080813 exactly means?

thanks for any input