v tom pripade zkus nahrat vsechny soubory ze slozky DOS
do korene prazdne usb flashky
http://imageshack.us/f/513/acerupdatebiosu.png/
EDIT
ta flashka musi byt bootovaci
v tom pripade
si stahni tohle : http://www.sevenforums.com/attachments/tutorials/4 2023d1260810265-ms-dos-bootable-flash-drive-create -win98boot.zip
rozbal to na disk
pak si stahni tohle
http://download.chip.eu/cz/HP-USB-Disk-Storage-For mat-Tool_176936.html
spust to a pomoci HP toolu vytvor bootovaci USB disk
http://1url.cz/nMyJ
citovano z
http://www.sevenforums.com/tutorials/46707-ms-dos- bootable-flash-drive-create.html