My thought is that, somehow, you have to get back to a "restore point" of a different date
in Windows, and it will probably boot up. However, since you can't get into windows, I am wondering if you are trying getting into a help screen or into the bios screen, while it is attempting to boot. To do this, you would have to hit the appropriate key, which I believe would be F12 F11 or F8, and hold that key while it tries to boot.
To find out the correct key, ask another person who has XP to restart their computer for you and look for the message that says you can go into bios if your press such and such key.
Another suggestion, is that, sometimes a black screen will come on. If it does, try
hitting F1. That may "resume" the boot.
Are you familiar with the old DOS commands? You could go into a DOS screen and
type c:\windows\DIR/W, and ENTER to see if you can pull up the various files in the Windows directory. Look for files ending in .exe and try running them in DOS.
Anyway, the problem would perhaps be solved if you had made a "boot disk" from Windows when you first installed it. Perhaps a friend has a boot disk you can use to get it started and then try to figure out the problem once it is started.
I sure there are some software dealing with restoration...look at a good software store.
Hope something here gives you a clue
44guyMod Edit: Removed unnecessary quote - Hamluis.
Edited by hamluis, 16 July 2012 - 02:34 PM.
Removed quote from response - Hamluis.