Ok, I never used a mac before and I was trying to partition the hard drive. It is fairly new, so there wasn't much data to save. I cleared out the hard drive manually in the Disk utilities and rebooted the laptop. Now I'm getting a grey screen with a question mark. I looked around and I know I have to re-install the software, but I tried everything (Cmnd +R, p+q, holding option takes me to a grey lockscreen) but can't get to the disk utility page again. How do I reinstall the software with no cd drive and my only other desktop is a pc?