then it slowed down and i thought why not reinstall vista ultimate to start are fresh then it start to load then stopped half way through as if it was corrupted thats what i believe then because im an amarture in computers i tried to install XP which refused because it can not find any installed harddrive.i removed the bios setup batterry also it only unset the time and date but nothing else the reason why i went to the battery is when my computer starts and emmidiately press F10 it gives me setup and ask me to enter setup key which i dont have and looks blanks without any other option when i press anywhere in the keyboard it does not respond but will respond when i press enter.ok so far vista failed after i tried to install many times and also xp whch gave an error message that no harddisk found.i looked for a new vista op i tried it , it reinstalled normally to the end it asked me of the admin name and password i entered then computer name i entered then it continued to check perfomance of the computer it did so then it rebooted which now game the problem i asked in the.when i press any key i reach a command line like it instruct me but i really bont know what to type there.if you know tell me please. Again when i press Esc it gives me 3 option of windows vista , windows NT/2000/XP,THEN COMMAND LINE, BUT WHITH THIS OPTIONS I AM BEING ASKED TO CHOOSE ONE OF THEM AND EDIT, or boot .for editing i dont kow when triying to boot it fails. this is what it says when i restart the computer.
booting 'windows vista'
acpi
vista loader 2.0.0
done!
fallback 1
find --set-root /bootmgr
error 17: file not found
booting 'windows NT/2000/XP'
fallback 2
find -- set-root /ntldr
error 17: file not found
booting 'Enter Command Line'
boot failed! Press any key to enter command line.
when i press any key it guives me this.
GRUB4DOS 0.4.2 (2007-03-02), Memory: 639k / 502M, CodeEnd: 0x4013C
[Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename. ESC at any time exits. ]
grub>
guys what should i do i tried to reinstall vista may time after completions of installing it goes back here. HELP ME.

