Lion not getting installed properly
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...