MSI Hermes 845GV

type: desktop - SlimPC - barebone
System info: MSIHermes 845GV.
cpu: Intel(R) Pentium(R) 4 CPU 2.66GHz
memory: 1024 MB (2 slots, 2 x 512MB DDR DIMM)
disk: ad0: 114498MB <SAMSUNG SP1213N TL100-24> at ata0-master UDMA100
optical drive: acd0: DVDR <ATAPI DVD DUAL 4XMax/2.23> at ata1-master UDMA33
video: Intel 82845G/GL/GV/GE/PE Integrated Graphics Device
sound: snd_ich - Intel 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller
network - wired: fxp0 - Intel 82801DB/DBL (ICH4/ICH4-L) PRO/100 VE Network Connection
other: the machine has a Terratec Cinergy 1200 DVB-C card installed.
bios: American Megatrends Inc. - V3.4 - Release Date: 10/20/04

More info: FreeBSD, OpenSolaris, Windows XP, Xubuntu,

event log:
2008-05-18: the machine doesn't want to boot with a usb stick in one of the usb ports. Doesn't matter if I try default boot or the boot menu, the machine just hangs.