You will have to repair the file. Try this:

Insert the XP disk into the machine and turn it on. A message will appear asking you to press any key to boot to the XP CD. Press any key and the machine will boot to the CD. When the setup screen loads choose the option to repair the windows installation by pressing R. It will then ask you what drive (the drive windows XP is installed on)you want to go to. Choose whichever drive this is...C,D or E, etc.
It will then ask you for and administor password. Generally this is blank so just hit return but if you created an administrator password when you first installed windows then use that one.
You will be then brought to the dos prompt of the drive windows XP is installed on. Lets say for arguments sake the drive windows is installed on here is C and the CD drive is D
So you will see C:\>
At this prompt type the following copy D:\i386\ha.dl_ C:\windows\system32\hal.dll

So it should appear on the screen as-

C:\>copy D:\i386\ha.dl_ C:\windows\system32\hal.dll

Hit return and it will then ask you if you want to overwrite the file hal.dll if its there, type Y and hit return. It will then say ! file copied.
When this is done simply reboot your computer and it should boot up normally.

Hope this helps.

i type in r and drive c then enter  it said c invied help

I am sorry, but I don't know what you mean. I will give you a web site to read about repair at
Microsoft page. Hope this helps.