Please help. My friend has a 20 GB hard drive that has been partitioned into 2. The 'c' drive which has the operating system on needs to be reformatted and then I need to reinstall Windows on it. I need to do this because the computer has had loads of problems. Please can someone talk me through on how to do this or give me a link that tells me what to do? I have never done this before so I am unsure what to do. Please help. Thank you Please help me.