DiagnoseHardwareProblems

• http://www.hiren.info/pages/bootcd hiren's BootCD download - linux bootcd with incredible many diagnostic tools. Can also boot from usb
• http://www.ultimatebootcd.com/ - stripped windows xp bootable cd with a lot of diagnostic programs
• ubuntu live cd - delivers either a memcheck or harddisk check in the bootmenu
• http://www.pcdiagnostics.eu/quicktech-usb.html commercial diagnostics tool ( we don't have licence )

above list is based on tips from : http://lifehacker.com/5551188/best-computer-diagnostic-tools