DeathscytheX5

Hello all. I have a serious problem here with my computer. When the Operating System tries to load, right after the XP professional loading screen, the computer restarts. If I press F8 at the start-up and choose the option 'Don't restart computer on system failure' after the XP screen, a blue sceen appears with some error like 'error occured at (0000????) x (00000000) system ended. I belive I know what the problem is, I can recall that one of the last things I did (which was kinda stupid ) was that moved the dll file 'secur32.dll' from the system32 folder and into a new one. Here I renamed it secur32.dll[system32] with the intentions of returning it. I was tryng to get rid of a program that I could not delete, one of its dependancies was secur32.dll so I moved to another location so that it could not read it. When I restarted the computer it could not load again!!! I then learned that secur32.dll was essential for the OS to load. I was wondering if there is some way to: (1) Read the file from a floppy at the required time. (2) Run the OS in some MS-DOS or command prompt mode where I won't get the error and may be able to copy back to file to the required place. (Note: I treid all the options at the F8 screen) (3) Download files from internet to make a start up disk to run the secur32.dll or copy it to its place. Please help me quickly someone! I shall post if needed the error on the blue screen. Thank you for your time!