My ACER ONE askme a paswork when start, and that passwork no it is the setup pass, and i can´t load mi OS.

Yes. You will need a bootable USB stick. There are numerous utilities for most OS choices on the internet.

On the Gmail sign-in page, click the "Can't access your account?" link.

1) Start your computer and press F8 rapidly continuosly
2) Then enter Safe Mode (This step takes around 1minute to FINISH)
3) Then you should be on the LOG IN page
4) Log in into ADMINISTRATOR
5) Go to Control Panel and change the password
6) Now restart computer NORMALLY without pressing F8
7) Now Log in into your account that you forget the password to! (Remember that you changed the pass to it in SAFE MODE)

Your going to have to re-load win from the OS disk(s)

If the Vista DVD you are using doesn't see the Hard drive then you need to load the SATA driver during setup
http://support.dell.com/support/downloads/download.aspx?c=us&cs=19&l=en&s=dhs&releaseid=R167809&SystemID=INS_PNT_PM_1721&servicetag=&os=WLH&osl=en&deviceid=13809&devlib=0&typecnt=0&vercnt=2&catid=-1&impid=-1&formatcnt=1&libid=41&typeid=-1&dateid=-1&formatid=-1&fileid=227437

was there any liquid damage? just to check the intregrity of the hardware i would maybe boot off of a linux distro just to check and see if it works that way. ubuntu is free and if you can choose to "try linux without installing" option just to verify. this will let you know if it is a hardware or software problem.

WIth the limited fault description its a guess at best. you probably have a corrupted driver or hard disk fault. If you can try a replacement hard drive and reload OS you should get progress.

what is password? for windows? for BIOS? for what?....
you use eeePC with Linux OS or Microsoft Windows OS? For Linux, follow my instruction for recovery your OS. Press F9, after you turn ON your netbook. And follow that instruction. Or you can use recovery DVD (include your netbook), after you plug in external DVD-ROM and make it boot priority for first is DVD-ROM (enter your BIOS first).

turn on pc enter bios setup select default settings save and restart.have os disk in drive wait for screen display any key to start from cd.press any key to load disk.in options select install windows ( not repair) your system will find existing os ,now you can choose repair or install fresh copy.if you choose to install fresh copy delete partition first and create new partition and format.

i think this is a os problem or hardisk problem change check hard disk