I bought a computer a year ago and was never able to defrag it because for some reason the C: drive would never show up. So googled my issue and found something about checkdisk utility Heres the thread...
I dont know how these forums work but I was having this problem as well and I did all the things you guys said to do Now my computer doesnt work at all... it says BOOTMGR is Missing and my computer will not do anything...