Hi guys, hope you can help me here. I followed apple's own instructions for a clean install. I booted from the USB restore disk. First I ran Disk utility to erase the current volume. Then I just did a normal install. When I do this the macbook air takes around 1 minute to boot, with the loading circle animation rotating 16 times. Prior to restore it was 1.5 times. Now I have tried restoring the same way a few times since and it does the same thing. I have also left the system idle and restarted it multiple times to see if it will "bed in" but it stays just as bad! Does anyone on here know why this might be? Thanks in advance.