Using the windows cd.

if it cant boot at all, then its most likely not a software provlem but a hardware problem in which case reformatting wouldnt solve anything anyway

Using bootable CD with HD tools.
Plugging the drive into another machine that can boot.

I agree it sounds like a hard ware problem, but if there is another reason you want to format the hard drive, take the hard drive out, attach it to an external device, or attach it internally, to a working PC and reformat that way.

if your pc work properly
follow this step
1) you can direct format ur harddisk
&
2)right click to my computer
go manage
disk management
format

remove harddisk
install any pc
& format it

First, are you comfortable working with the hardware? If not, get a qualified friend to help you. If the PC will not boot at all, start checking the basics: is it getting power? Is the screen getting power? Is the screen connected? Does the screen work? Test it on another PC. Once you have eliminated all the basic stuff, you then start getting you hands dirty on the stuff inside. Email me if you need a full list of steps to solve this problem. Best of luck

set the bios to boot from hdd(hard disk drive) if it isn't helps then set the bios to boot from cd/dvd and put the op-system disk and format with that....after formatting that hard disk all of your data will be lost....

I think most of you guys are missing the point - if he can't boot, then what good is a boot disk going to do him??

As has been mentioned in first response; if it won't boot at all, in any fashion, it's a hardware issue.

Definitely a hardware problem. If you are okay with working on the hardware you could try this: remove power from the tower, remove the cover of the PC, disconnect the cables from the HDD and CD/DVD drives....both cable from each. Take note of the orientation of the cables makes it easier to put back. Plug the tower back in and then power it up. When it says no bootable media turn off via power button. Disconnect from the power again, plug the cables back in and then power up. If you still can't boot up try resetting the CMOS, you will need to check your motherboard manual for the correct jumper settings. Make sure that you are discinnected from the power before you do this.

Let us know how you get on.

Dave

Not necessarily so. I had couple of experiences when corrupt registry rendered my machine unbootable, even via XP setup CD.