need_help

Hi, can someone help??? I accidently turned my laptop off whilst performing a system restore, and now my laptop wont even boot and get past the following message: "Windows could not start because the following file is missing or corrupt: <Windows root>\system32\hal.dll " I try to press F8, but the comp will not Boot what so ever. I have not got the Microsoft XP disc that I think I need to re-install, can this be resolved in another way? I'm using my mothers comp at the moment, can I copy something from here that I can use to boot my Laptop with? If I create a system backup disc will this work on the laptop? I'd be gratefull if someone out there could help, and even email me, thanks!