Is there any way to restore it to factory settings with out the disk?

I got a macbook off of a friend with all the proper disks, did the installation and set up and did all the updates. Now after having restarted the computer with the new updates I'm trying to install iworks(it always asks for the admin. name and password), but it keeps saying that I have the incorrect administrator name or password yet I can log on and off just fine. Is there any way I can fix this or reset it to the factory settings with out having to use the disk?

OK, then you can try this instead:
I lost my admin user (OS X 10.5)
If you are unfortunate enough to delete your only admin user, or remove his admin capability, then as long as you have another user with login capability, you can give that user admin rights as shown below.  Print this post out in a mono-spaced font, and type carefully, paying attention to spaces and punctuation, since you cannot copy/paste in Single User mode.  Caution: in single user mode you have root privileges. Be careful!
Substitute the name of 'youruser' below. 
Boot into single-user mode which will eventually get you to a shell prompt (ending in #). Then type the following (Press RETURN after each command): 
/sbin/fsck -fy 
Repeat the above until it says your disk is OK. Then continue with 
/sbin/mount -uw / 
/usr/bin/dscl . -merge /groups/admin users youruser 
If you get a message saying "invalid path", then type these two commands first:  
/usr/bin/dscl . -create /groups/admin gid 80
/usr/bin/dscl . -create /groups/admin passwd '*'
and then repeat the "dscl ... -merge" command.
Then:
reboot 
You will now be able to login as 'youruser' and have administrative privileges.  Membership of the 'admin' group is the only thing that distinguishes administrative users from ordinary users.

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