Lion not getting installed properly I bought a used Mac that only had Windows 7 installed. The seller didn't have the original OS DVD, and the hard drive only had a single NTFS partition. I downloaded Lion from a torrent, burned it to a DVD and attempted to install it. When I create a user, it errors out and continues to ask me to create a user again and again.

How do I get past the user creation step?
One solution would be to not download a copy of OS X from a torrent, you never know what you are getting. 


Obtain a legal, trusted copy of OS X. If your Mac supports it you can get Mountain Lion for $19.99 USD from the App Store, if not you can order OS X Lion from apple for probably around $29.99.


Borrow a friends Mac, visit a Mac at an Apple Store, etc., log in to Mac App Store using your Apple ID.
Buy and download OS X.
Make a boot-able USB OS X installer
Log out of app store
Delete the installer you downloaded. 

Boot from that copy, by holding down the option key while booting your mac.
Run Disk Utility from the OS X install media, erase the entire hard drive.
Install OS X
Enjoy...