How To Fresh Install ML I'm having some problems with entering sleep and wakening, so I'm considering making a fresh installation of Mountain Lion. How can I make a fresh install of ML? I have Bootcamp partition which I'd like to remove also.

Also, what is the procedure for fresh Lion install?(maybe I'll try installing this OS because in Lion I didn't have this problem).

BTW - I have ML downloaded through Apple Store because I bought the new laptop and I'm entitled for upgrading.

Thanks
A clean reinstall of Mountain Lion involves creating a bootable USB stick from the installer downloaded from the App Store. You would then boot from it by holding ALT (Option) while rebooting.  When you boot into the USB stick, use Disk Utility to delete both the Lion and Windows partitions from your drive.

As for clean reinstalling Lion, since it came pre-installed, you would have to backup your hard drive and 'erase' it which would then prompt you to reinstall the OS.