A while ago I made a windows 8 dualboot (windows 7 is my primary OS) for some reason it didn't work on my laptop so I just booted back into windows 7. I couldn't be bothered at the time to get rid of the dualboot screen and the part ion at that time, but at last night I decided to get rid of it, just like I did with Ubuntu a while ago. My plan was to use BCD to overwrite the mbr then I'd delete the partion, but I stupidly clicked "install BCD" onto my C drive thus removing my OS, I then clicked "Write MBR". Once I had restarted my laptop I realised what a mistake I made, now I can't boot into windows 7, so what should I do? Thanks.