i have a 2010 macbook white. i was finding it all cloged up so i thought of having lion installed but also a clean format. i backed up all my data. and i deleted bootcamp(windows xp) by going to bootcamp assistant and restoring the partition. after doin this i restarted my laptop and the system got hung. wat i observed was that the mouse would move around on the screen seamlessly but the mouse would refuse to click on any particular selection(icon, word, menu) i first thought it was an issue with the trackpad so i connected my usb mouse which demonstrated the same problem. i restarted the pc twice and i still had that issue. so i put in the mac osx snow leopard disk that came with the mac and tried to reinstal it but it went extremely slow. for half an hour the apple logo wid the spiral animation in the bottom was on and after that wen it came to choosing the language it refused to select the language for about 15mins.it wouldnt select via mouse nor by navigating through the keyboard. atlast i reformated the hard drive again to mac journaled and then it began the installation of the mac operating system. it showed me 40minutes in the beginning which took it 1 hour to reach 20 minutes and after reaching 20 minutes it got hung again. could some1 please temme wat is the cause for this and wat could be the solution its just a 3 month old laptop. hasnt had any physical damage to effect the hardware and has always been kept at home itself. please do reply with a solution.