Windows 7: Computer will not boot

when i switch on my widows xp comptuer befor it get to loading windows but affter it started botting from hard disk
i get to small smile face in rectangle with rounded corners
how do i fix this this is befir i can press F8

As soon as you power on your computer, immediately start clicking the F8 key and keep clicking until the Advanced Boot Options menu appears. Once you get into the Advanced Boot Options menu you should be able to use your up/down arrows to select (highlight) Safe Mode. Click Enter and Safe Mode should start. (You'll see the words Safe Mode on all four corners of the screen.) From Safe Mode I'd try to access System Restore and roll back your computer to a restore point before this problem first began.

How to restore Windows XP to a previous state

If a restore point doesn't fix thing, you might want to go through this article for other troubleshooting steps.

10 things you can do when Windows XP won't boot | TechRepublic

It is just befor you can press F8 but i try it again

the artical says you need to be loged on i can not boot

i give the 10 tips ago but at a quick like they look like they will not help

There is no prompt that tells you to start clicking F8. That's why you have to start clicking it as soon as you power up the computer. Are you saying that F8 just won't work? Can you access your BIOS? As soon as you power on the computer what happens if you start clicking F2 or F12 (the usual ways to access setup?)

If you can access the BIOS you might be able to change the boot order to boot from the CD/DVD drive as the first option. Then you could insert the XP install disk and boot fom it.

F8 dose not work
i can assces BIOS and i set it to boot from the hard disk

Is there no BIOS option to boot from the CD/DVD drive?

i can boot from CD/Floppy disk
no DVD drive yet

Boot the XP CD to run XP Repair Install