Laptop “Load Error”

After having installed Windows XP on my laptop with Office XP, I installed a couple of games and restarted to make sure that everything was loaded properley (I did a fresh install on the NTFS file system). Unfortunately, I left a disk in the drive with some files on it, and I received the usual “Non-System diskette” error, so I took out the disk and hit a key. Now I recieve a “Load Error” screen everytime I try to enter Windows. I tried entering it in Safe Mode and it still wouldn’t work. Now Ican’t boot up even in Safe Mode. How can I sort this out, preferably without using the Restore Disk that came with the laptop, as that restores it to Me. Thanks in advance